Roblox Turret Script

local bullet = script.Bullet
bullet.Parent = nil
local tab = {}
script.Parent.Trigger.Touched:Connect(function(prt)
    if prt.Parent and prt.Parent:FindFirstChildOfClass("Humanoid") and prt.Parent:FindFirstChild("HumanoidRootPart") and not tab[prt.Parent] then
        coroutine.resume(coroutine.create(function()
            tab[prt.Parent] = true;
            while true do
                wait(0.5)
                if prt.Parent:FindFirstChild("HumanoidRootPart") and prt.Parent:FindFirstChildOfClass("Humanoid") and prt.Parent:FindFirstChildOfClass("Humanoid").Health > 0 then
                    if (prt.Parent:FindFirstChild("HumanoidRootPart").Position-script.Parent.Main.Position).magnitude > 35 then
                        break;
                    end
                    script.Parent.Main.CFrame = CFrame.new(script.Parent.Main.Position,prt.Parent:FindFirstChild("HumanoidRootPart").Position)
                    local newbullet = bullet:Clone()
                    newbullet.CFrame = script.Parent.Barrel.ShotPoint.WorldCFrame;
                    Instance.new("BodyVelocity",newbullet).Velocity = script.Parent.Main.CFrame.LookVector*200;
                    newbullet.Touched:connect(function(prta)
                        if prta.Parent and prta.Parent:FindFirstChildOfClass("Humanoid") then
                            prta.Parent:FindFirstChildOfClass("Humanoid"):TakeDamage(25);
                            newbullet:Destroy();

                        end
                    end)
                    game:GetService("Debris"):AddItem(newbullet,20);
                    newbullet.Parent = workspace
                else
                    break;
                end
            end
            tab[prt.Parent] = false
        end))
    end
end)