Cancelling structure placement

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#1

So I am making a system where you can build snow forts and structures n stuff.

I’m trying to make it so you can cancel the building process by unequipping the tool or by getting hit with a snowball. And I can’t seem to figure out how I can do this without this one problem.

The problem is that when you start building the structure then cancel it then start building it again, the character stops in the middle of building it and you can move around while the structure is still being built.

My code:

local isBuilding = false
local Cancelled = false

function onBuild(plr,Snowprint)
	isBuilding = true

	local moduleName = string.gsub(Snowprint.Name," ","")
	module[moduleName](plr,plr,currentStructure)

	if not Cancelled then
		isBuilding = false
		currentStructure = nil
		if anim then anim:Stop() end
		anim = nil
		return true
	else
		Cancelled = false
		return false
	end
end

function onCancel(plr)
	if isBuilding then
		Cancelled = true
		if isBuilding == false then
			Cancelled = false
		end
	end
end

Any help is appreciated.