how do i make this script work?

d = true

function onClick()
	script.Parent.BrickColor = BrickColor.new("Really red")
	if d == true then
	local q = Instance.new("Part",workspace)
	q.Size = Vector3.new(1,1,1)
	q.Position = Vector3.new(-213.7, 4.5, 8.9)
	q.BrickColor = BrickColor.new("Lapis")
	else print("NOOOOO")
		end
	d = false
	wait(3)
	d = true
	script.Parent.BrickColor = BrickColor.new("Lime green")
		end

script.Parent.ClickDetector.MouseClick:connect(onClick)

it works, just not reliably. its supposed to create the part, wait 3, then allow for the part to be created again. uts hard to explain waht happens. put a click detecter in a part, put this script in it, and when you click it look for parts in the workspace. i'ts late where i am, and i have thoroughly exhausted all my brainpower. please fix this.