Dash Script

local RS = game:GetService('ReplicatedStorage')
local uis = game:GetService('UserInputService')
local speed = 120
local duration = .3
local cooldown = 5
local debounce = {}

RS.FlashStepDash.OnServerEvent:Connect(function(Player)
    if debounce[Player] then return end
    debounce[Player] = true

    local delete = {}
    local Transparency = {}

    local character = Player.Character
    local attachment = Instance.new('Attachment', character.HumanoidRootPart)
    local LinearVelocity = Instance.new('LinearVelocity', character.HumanoidRootPart)

    delete[#delete + 1] = attachment
    delete[#delete + 1] = LinearVelocity

    LinearVelocity.MaxForce = 300000
    LinearVelocity.Attachment0 = attachment
    LinearVelocity.VelocityConstraintMode = Enum.VelocityConstraintMode.Line
    if uis:IsKeyDown(Enum.KeyCode.A) then
        LinearVelocity.LineDirection = Vector3.new(character.HumanoidRootPart.CFrame.LookVector.X, 0, character.HumanoidRootPart.CFrame.LookVector.Z.math.rad(270))
        elseif uis:IsKeyDown(Enum.KeyCode.D) then
            LinearVelocity.LineDirection = Vector3.new(character.HumanoidRootPart.CFrame.LookVector.X, 0, character.HumanoidRootPart.CFrame.LookVector.Z.math.rad(90))
            elseif uis:IsKeyDown(Enum.KeyCode.S) then
                LinearVelocity.LineDirection = Vector3.new(character.HumanoidRootPart.CFrame.LookVector.X, 0, character.HumanoidRootPart.CFrame.LookVector.Z.math.rad(180))
                elseif uis:IsKeyDown(Enum.KeyCode.W) then
                    LinearVelocity.LineDirection = Vector3.new(character.HumanoidRootPart.CFrame.LookVector.X, 0, character.HumanoidRootPart.CFrame.LookVector.Z)
                end

    LinearVelocity.LineVelocity = speed

    local Particle = RS.BlackFlash
    local ClonedParticle =Particle:Clone()
    ClonedParticle.Parent = character.HumanoidRootPart
    delete[#delete+1] = ClonedParticle

    for Index,Value in pairs(character:GetDescendants()) do
        if not Value:IsA('BasePart') then continue end
        Transparency[Value] = Value.Transparency
        Value.Transparency = 1
    end

    wait(duration)

    for i,v in pairs(Transparency) do
        i.Transparency = v
    end
    for i, v in pairs(delete) do
        v:Destroy()
        delete[i] = nil
    end
    wait(cooldown)
    debounce[Player] = nil
end)