How to destroy a part created using a script when deleted that script or disabled it

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#1

So I have a very basic NPC that shoots a ball projectile but when it dies the script will still keep running and shooting the ball. So background knowledge: this ball projectile is summoned then gradually gets bigger then it shoots. So my solution is to use the humanoid.Died function to destroy the script but at the same time if the npc dies when the script is still in the middle of building the projectile, it will destroy the script or disable it thus making the unfinished projectile just stay on workspace. How would I be able to remove the projectile once the NPC dies?

Code:
Shooting the projectile

hum.Died:Connect(function()
	script.Disabled = true
end)

while true do
	wait()
	local target = findTarget(hrp.Position)
	local raycast = rayCast()
	local waypoints = pathfinding:GetWaypoints()
	if target then
		for i, v in ipairs(waypoints) do
			if pathfinding.Status == Enum.PathStatus.Success then
				if(hrp.Position - target.Position).Magnitude < Settings.ShootRange.Value and (target.Position - hrp.Position):Dot(hrp.CFrame.LookVector) > 0 then
					if raycast then
						lookat(target, hrp)
						powerball.power(hrp)
						break
					end
				end
			end
			hum:MoveTo(waypoints[2].Position)
		end
	end
end

The Module Script

PowerBall.power = function(parenthrp)
	local debris = game:GetService("Debris")
	local part = Instance.new("Part")
	local bv = Instance.new("BodyVelocity")
	local sound = Instance.new("Sound")
	sound.SoundId = "rbxassetid://6769550180"
	sound.Volume = .5
	sound.Looped = true
	bv.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
	bv.P = math.huge
	bv.Parent = part
	part.AssemblyLinearVelocity = parenthrp.CFrame.LookVector * 50
	bv.Velocity = part.AssemblyLinearVelocity
	part.Material = Enum.Material.Neon
	part.Anchored = true
	part.Color = Color3.new(0.666667, 0.666667, 1)
	part.Shape = Enum.PartType.Ball
	part.CanCollide = false
	part.Position = parenthrp.Position + parenthrp.CFrame.LookVector * 10
	part.Size = Vector3.new(.1,.1,.1)
	part.Parent = workspace
	sound.Parent = part
	sound:Play()
	part.AssemblyLinearVelocity = parenthrp.CFrame.LookVector * 50
	bv.Velocity = part.AssemblyLinearVelocity
	for i, v in ipairs(lightning) do
		local clone = v:Clone()
		clone.Parent = part
	end
	for i = .1, 10, .1 do
		wait()
		part.Size = Vector3.new(i,i,i)
	end
	wait(.5)
	lightsounds(part)
	part.Anchored = false
	part.Touched:Connect(function(hit)
		local hum = hit.Parent:FindFirstChild("Humanoid")
		local hrp = hit.Parent:FindFirstChild("HumanoidRootPart")
		if hum and hum.Health > 0 and hrp and hit.Parent ~= parenthrp.Parent then
			hum:TakeDamage(100)
		end
	end)
	debris:AddItem(part, 10)
end

So in summary, these scripts will not run in an instant because of delays and because of that if deleted while in the middle of the script, it will stop everything entirely and just leaves what is created(the projectile) in the workspace.

#2

You could run a check to see if the NPC’s health is 0 or use .Died on the NPC’s humanoid and then use :Destroy() on the projectile in workspace.

#3

That would destroy all the projectiles created by the npc if there are multiple projectiles in workspace(the ones that successfully ran the full script and the ones that didn’t). It will also destroy the duplicates of that npc’s projectiles. But this code is very sloppy and not effective so I guess I just have to find a better way to create projectile npcs.