Laser Gun for Roblox

function snapToTorso(pos)
    local list = game.Workspace:children()
    local torso = nil
    local dist = 100
    local temp = nil
    local human = nil
    local temp2 = nil
    for x = 1, #list do
        temp2 = list[x]
        if (temp2.className == "Model") and (temp2 ~= script.Parent) then
            temp = temp2:findFirstChild("Torso")
            human = temp2:findFirstChild("Humanoid")
            if (temp ~= nil) and (human ~= nil) and (human.Health > 0) then
                if (temp.Position - pos).magnitude < dist then
                    torso = temp
                    dist = (temp.Position - pos).magnitude
                    annihilate()
                end
            end
        end
    end
    return torso
end

function annihilate(gun,targ)
pcall(function() p:remove() end)
p = Instance.new("Part")
p.BrickColor = BrickColor.new(21)
p.Anchored = true
p.CanCollide = false
p.formFactor = "Plate"
p.Size = Vector3.new(1,0.4,1)
p.TopSurface = "Smooth"
p.BottomSurface = "Smooth"
local sm = Instance.new("SpecialMesh")
sm.MeshType = "Sphere"
sm.Parent = p
local mag = (gun.Position - targ).magnitude
local aim = CFrame.new(gun.Position,targ)
p.CFrame = aim + (aim.lookVector * (mag / 2))
sm.Scale = Vector3.new(0.2,0.2,mag )
p.Parent = workspace
coroutine.resume(coroutine.create(function()
wait(0.3)
pcall(function() p:remove() end)
end))
end
laser(script.Parent.Shooter,torso)
local ex = Instance.new("Explosion")
ex.Position = torso
ex.BlastRadius = 3
ex.Parent = workspace
end)
end)