Better E Laser

print'https://pastebin.com/A3LTyBrB'
--// Why is this better? it recycles the laser and sound.
local function Get_Components_Of_Mouse(player)
    local pchar = player.Character
    if pchar then
        local Remote = pchar:FindFirstChild('RE_Mouse')or
            Instance.new("RemoteEvent",pchar)
        Remote.Name = 'RE_Mouse'

        Remote.Parent = NLS(
            [[
local lp,runs,re =
    game:GetService'Players'.LocalPlayer,game:GetService'RunService',
    script:WaitForChild('RE_Mouse')
local mouse = lp:GetMouse()

mouse.KeyDown:Connect(function(k)
    re:FireServer('KeyDown',k,mouse.Hit)
end)
            ]]
            ,pchar)
        return Remote
    else
        error('Best to actually put your character In the game.')
    end
end
local re = Get_Components_Of_Mouse(owner)
local person = owner.Character
local deb = game:GetService("Debris")
local head = person:WaitForChild'Head'
local _ = person:WaitForChild'HumanoidRootPart'
local _ = person:WaitForChild'Humanoid'

-- // Weapons Closet \\ --

local function Damage(part)
    --[[
        // Description \\
        This Function can damage a model with a given part. The default damage is 10,
        and can not be adjusted If its replacing an unnamed Function in an event.
        So it's best advised to change the
        local varables within the Function. If a humanoid is not found, the model will
        be killed.

        Local varables:
            (Number) Kill_At_LargeHealth
                Automatically kills player if the humanoid's health is atleast of
                this number. If the number is 0, Then it does nothing.
            (Number) Damage_humanoid
                Amount of damage towards the humanoid.
    --]]
    local Kill_At_LargeHealth = 100
    local Damage_humanoid = 10
    pcall(function()
        local mod = part:FindFirstAncestorWhichIsA'Model'
        if mod then
            if mod~=workspace then
                local hum = mod:FindFirstChildWhichIsA'Humanoid'
                local target = mod:FindFirstChild'Head'or mod:FindFirstChild'Torso'or mod:FindFirstChild'UpperTorso'or mod:FindFirstChild'HumanoidRootPart'
                if hum then
                    if hum.Health>Kill_At_LargeHealth and Kill_At_LargeHealth~=0 then
                        hum.Health = 0
                    else
                        if hum.Health>0 then
                            hum:TakeDamage(Damage_humanoid)
                        end
                    end
                elseif target then
                    target:Destroy()
                else
                    mod:BreakJoints()
                end
            end
        end
    end)
end
local function CustomDamage(part,damage,Kill_At_Large_Health,noharm)
    --[[
        // Description \\
        Similar to Damage() except you can not use it to replace an unamed Function
        in an event, but this version has parameters.

        --> Manatory
            (Instance) Part the Function will be checking.
            (Number) Amount of damage.
        --> Optional
            (Number) Amount of health that a player needs in order to be automatically
            killed.
                Default =
                    0
            (Instance) The Instance that the Function will be ignoring.
                Default =
                    nil
    --]]
    if not Kill_At_Large_Health then
        Kill_At_Large_Health = 0
    end
    pcall(function()
        local mod = part:FindFirstAncestorWhichIsA'Model'
        if mod then
            if mod~=workspace then
                local bool = true
                if noharm then
                    if noharm==mod then
                        bool = false
                    end
                end
                if bool then
                    local hum = mod:FindFirstChildWhichIsA'Humanoid'
                    local target = mod:FindFirstChild'Head'or mod:FindFirstChild'Torso'or mod:FindFirstChild'UpperTorso'or mod:FindFirstChild'HumanoidRootPart'
                    if hum then
                        if hum.Health>100 then
                            hum.Health = 0
                        else
                            if hum.Health>0 then
                                hum:TakeDamage(damage)
                            end
                        end
                    elseif target then
                        target:Destroy()
                    else
                        mod:BreakJoints()
                    end
                end
            end
        end
    end)
end
local function Explosion_Effect(hit,bullet,noharm,damage,part_properties,end_size,tw_info,
end_properties)
    --[[
        // Description \\
        Explosion on hit.

        M hit (Instance) Part that's the target part.
        O
    --]]
    local function Check_Parameter(para,def)
        if para then
            if typeof(para)==typeof(def)then
                return para
            end
        end
        return def
    end

end

local function Laser_Beam(Start_Pos,End_Cframe,part_properties,beam_width,damage,
delay_damage,noharm,duration)
    --[[
        // Description \\
        Returns part that will mimic a laser beam. Often Varies from the style.
        Best to keep the laser beam as a block and not a cylinder.

        Note theres alot of parameters so bare with me.

        M = Manatory
        O = Optional

        M Start_Pos (Vector3) Position where the laser is starting.
        M End_Cframe (CFrame) Needed to find the size of laser's length and the
            End point.
        O part_properties (Table) Properties of the laser. Use the format:

                Property = value

            Default =
                (A typical brick except:)

                    Anchored = true,
                    Parent = nil

        O beam_width (Number) The width and height of the laser.
            Default =
                .1
        O damage (Number) The amount of damage it will deal.
            Default =
                10
        O delay_damage (Number) Delay in seconds for the laser to rest.
            Default =
                .1
        O noharm (Instance) Instance for the noharm argument in CustomDamage(). Basically
            ignores the model if the part it hits is a descendant of it.
            Default =
                nil
        O duration (Number) Amount in seconds before it disappears.
            Default =
                1
    --]]

    local part = Instance.new("Part")

    local function Check_Parameter(parameter,default)
        if parameter then
            if typeof(parameter)==typeof(default)then
                return parameter
            else
                return default
            end
        else
            return default
        end
    end
    beam_width = Check_Parameter(beam_width,.1)
    damage = Check_Parameter(damage,10)
    delay_damage = Check_Parameter(delay_damage,.1)
    duration = Check_Parameter(duration,1)

    local diff = (Start_Pos - End_Cframe.Position).Magnitude
    for i,v in pairs(part_properties)do
        pcall(function()
            part[i] = v
        end)
    end
    part.Anchored = true
    part.CFrame = CFrame.new(Start_Pos,End_Cframe.Position) * CFrame.new(0,0,-diff/2)
    part.Size = Vector3.new(beam_width,beam_width,diff)
    local bool = true
    part.Touched:Connect(function(h)
        if bool then
            bool = false
            CustomDamage(h,damage,nil,noharm)
            wait(delay_damage)
            bool = true
        end
    end)


    if duration then
        local debris = game:GetService("Debris")
        debris:AddItem(part,duration)
    end

    return part
end
local function Bullet_Beam(Start_Pos,End_Cframe,part_properties,beam_width,damage,
    delay_damage,bullet_length,type_of_travel,noharm,is_spawned,for_loop_steps,
    for_loop_stud_step_forward,for_loop_stud_step_delay,tw_info,effect_function)

    --[[
        // Description \\
        Fuck these parameters. I'm gonna make a simpler version some day.

        Returns a bullet. Note this can auto launch if you want to.

        M = Manatory
        O = Optional

        M Start_Pos (Vector3) Position where the bullet starts.
        M End_Cframe (CFrame) Necessary for the End Point of the bullet and the
            direction.
        O part_properties (Table) Table of properties for the bullet.
            Default =
                Most of the properties of a typical part.
        O beam_width (Number) The width and height of the bullet.
            Default =
                .1
        O damage (Number) The Damage it will deal.
            Default =
                10
        O delay_damage (Number) The delay of the bullet's damage
            Default =
                1
        O bullet_length (Number) The length of the bullet.
            Default =
                .25
        O type_of_travel (String) The Mode of travel:
             - 'for_loop'; This mode will look laggy and will use a for loop.
             - 'tween'; This mode will look smoother if in small servers and uses
                Tweenservice.
             - (Default) nil
            Note this will affect other parameters.
        O noharm (Instance) Parameter for CustomDamage()
            Default =
                nil
        O (type_of_travel~=nil) is_spawned (Boolean) Makes a new thread for the
            travel Function, If [type_of_travel] is not nil. In skid
            language, it will prevent the script from yielding/pause the script.
            Default =
                nil/false
        O (type_of_travel~=nil) for_loop_steps (Number)
            in type_of_travel=='for_loop', this number will be of how many times the
                bullet will phase through [for_loop_stud_step_forward] of studs.

            in type_of_travel=='tween', this number will be multiplied with
                [for_loop_stud_step_forward] to create the End point of the bullet.

            Default =
                10

        O (type_of_travel~=nil) for_loop_stud_step_forward (Number)
            in type_of_travel=='for_loop', this number will be the amount of studs that
                it will go through per phase.

            in type_of_travel=='tween', this number will be multiplied with
                [for_loop_steps] to create the End point of the bullet.

            Default =
                1
        O (type_of_travel=='for_loop') for_loop_stud_step_delay (Number)
            This number will be the amout in seconds the bullet will pause before it
            goes through another phase.

            Note this does not apply to (type_of_travel=='tween') because tween is
            based so that the bullet will travel to its End Position.
            (type_of_travel=='for_loop') is based so that it phases after a certiain
            amount of numbers.

            Default =
                .1
        O (type_of_travel=='tween') tw_info (TweenInfo)
            This will determine the time, and Enum.EasingStyle it will use.
            Default =
                TweenInfo.new(1,Enum.EasingStyle.Linear,
                Enum.EasingDirection.InOut,0,false,0)
        O effect_function (Function)
            Function when bullet hits a part.
            Default =
                CustomDamage()

    --]]

    local part = Instance.new("Part")
    local travel
    local diff = (Start_Pos - End_Cframe.Position).Magnitude

    local function Check_Parameter(parameter,default)
        if parameter then
            if typeof(parameter)==typeof(default)then
                return parameter
            else
                return default
            end
        else
            return default
        end
    end
    beam_width = Check_Parameter(beam_width,.1)
    damage = Check_Parameter(damage,10)
    delay_damage = Check_Parameter(delay_damage,.1)
    bullet_length = Check_Parameter(bullet_length,.25)
    for_loop_steps = Check_Parameter(for_loop_steps,10)
    for_loop_stud_step_forward = Check_Parameter(for_loop_stud_step_forward,1)
    for_loop_stud_step_delay = Check_Parameter(for_loop_stud_step_delay,.1)
    tw_info = Check_Parameter(tw_info,TweenInfo.new(1,Enum.EasingStyle.Linear,
                    Enum.EasingDirection.InOut,0,false,0))

    for i,v in pairs(part_properties)do
        pcall(function()
            part[i] = v
        end)
    end
    part.Anchored = true
    part.CFrame = CFrame.new(Start_Pos,End_Cframe.Position)
    part.Size = Vector3.new(beam_width,beam_width,bullet_length)
    local bool = true
    part.Touched:Connect(function(h)
        if bool then
            bool = false
            if not effect_function then
                CustomDamage(h,damage,nil,noharm)
            else
                effect_function(h,part,noharm)
            end
            wait(delay_damage)
            bool = true
        end
    end)

    if type_of_travel=='for_loop'then
        travel = function()
            for i=1,for_loop_steps do
                part.CFrame = part.CFrame *
                    CFrame.new(0,0,-for_loop_stud_step_forward)
                wait(for_loop_stud_step_delay)
            end
            part.Anchored = false
            part.CanCollide = false
        end
    elseif type_of_travel=='tween'then
        travel = function()
            local tws = game:GetService("TweenService")
            local prop = {
                CFrame = part.CFrame * CFrame.new(0,0,-(for_loop_steps * for_loop_stud_step_forward))
                }
            local an = tws:Create(part,tw_info,prop)
            an:Play()
            wait(an.TweenInfo.Time)
            part.Anchored = false
            part.CanCollide = false
        end
    end
    if travel then
        if is_spawned then
            spawn(travel)
        else
            travel()
        end
    end

    return part
end
local function Laser_Beam_Cylinder(Start_Pos,End_Cframe,part_properties,beam_width,damage,
delay_damage,noharm,duration)
    --[[
        // Description \\
        Returns part that will mimic a laser beam. Often Varies from the style.
        Best to keep the laser beam as a block and not a cylinder.

        Note theres alot of parameters so bare with me.

        M = Manatory
        O = Optional

        M Start_Pos (Vector3) Position where the laser is starting.
        M End_Cframe (CFrame) Needed to find the size of laser's length and the
            End point.
        O part_properties (Table) Properties of the laser. Use the format:

                Property = value

            Default =
                (A typical brick except:)

                    Anchored = true,
                    Parent = nil

        O beam_width (Number) The width and height of the laser.
            Default =
                .1
        O damage (Number) The amount of damage it will deal.
            Default =
                10
        O delay_damage (Number) Delay in seconds for the laser to rest.
            Default =
                .1
        O noharm (Instance) Instance for the noharm argument in CustomDamage(). Basically
            ignores the model if the part it hits is a descendant of it.
            Default =
                nil
        O duration (Number) Amount in seconds before it disappears.
            Default =
                1
    --]]

    local part = Instance.new("Part")

    local function Check_Parameter(parameter,default)
        if parameter then
            if typeof(parameter)==typeof(default)then
                return parameter
            else
                return default
            end
        else
            return default
        end
    end
    beam_width = Check_Parameter(beam_width,.1)
    damage = Check_Parameter(damage,10)
    delay_damage = Check_Parameter(delay_damage,.1)


    local diff = (Start_Pos - End_Cframe.Position).Magnitude
    for i,v in pairs(part_properties)do
        pcall(function()
            part[i] = v
        end)
    end
    part.Shape = 'Cylinder'
    part.Anchored = true
    part.CFrame = CFrame.new(Start_Pos,End_Cframe.Position) * CFrame.new(0,0,-diff/2)
    * CFrame.Angles(math.rad(90),0,math.rad(90))
    part.Size = Vector3.new(diff,beam_width,beam_width)
    local bool = true
    part.Touched:Connect(function(h)
        if bool then
            bool = false
            CustomDamage(h,damage,nil,noharm)
            wait(delay_damage)
            bool = true
        end
    end)


    if duration then
        local debris = game:GetService("Debris")
        debris:AddItem(part,duration)
    end

    return part
end


local function On_OnServerEvent(player,...)
    local parameters = {...}
    if parameters[1]=='KeyDown'and true then -- player==owner
        if parameters[2]=='e'and parameters[3]then
            local pchar = player.Character
            local folder = pchar:FindFirstChild'Lasers'or (function()
                    local a = Instance.new("Folder");a.Name='Lasers';
                    a.Parent=pchar;return a
            end)()
            local Start_Pos,End_Cframe,beam_width =
                head.Position + Vector3.new(0,5,0),parameters[3],1
            local beam = folder:FindFirstChild'Beam'or
                Laser_Beam_Cylinder(Start_Pos,End_Cframe,{Parent=folder,
                Name='Beam',Material='ForceField',CanCollide=false,
                BrickColor = BrickColor.new("Really red")},
                beam_width,100,.25,person)

            local diff = (Start_Pos - End_Cframe.Position).Magnitude
            beam.CFrame = CFrame.new(Start_Pos,End_Cframe.Position)*
                CFrame.new(0,0,-diff/2)*
                CFrame.Angles(math.rad(90),0,math.rad(90))
                beam.Size = Vector3.new(diff,beam_width,beam_width)
            local block = folder:FindFirstChild'Block'or(function()
                local b=Instance.new("Part");b.Size=Vector3.new(5,5,5);
                b.BrickColor=BrickColor.new("Really red");b.Anchored=true;
                b.Name = 'Block';b.CanCollide=false;b.Material='ForceField';
                b.Parent=folder;return b
            end)()
            block.CFrame = CFrame.new(Start_Pos,End_Cframe.Position)
            local Sound = block:FindFirstChildWhichIsA'Sound'or(function()
                local s=Instance.new("Sound");s.SoundId='rbxassetid://2544621925';
                s.Parent=block;s.Volume=2.5;return s
            end)()
            Sound:Play()
        end
    end
end



re.OnServerEvent:Connect(On_OnServerEvent)