How to stop a function outside of that function

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1

It’s really hard to explain the issue I’m facing because basically there is a function in the restaurant game I’m helping to make that keeps NPCS from going out of line when they are waiting to be served, and I have it so when a player seats one NPC all the other NPCS move up a spot in line and then walk forward, but the function keeping them from going back in line is stopping them from moving (I think)

Basically they cannot move forward in line because the function keeping them from going out of line is stopping them

In this “go back in line” function it is a loop always putting them in their correct position, and I also put in the loop to check if a variable is true or false to see if it should stop running this function.

Go back in line function 
local function goBackInLine(oldPos)
	walkAnimationTrack:Stop()

	task.spawn(function()
		while true do
			if stopBackInLine then
				print("stop")
				return
			end
			
			if not waited then
				if math.floor(script.Parent.HumanoidRootPart.Velocity.Magnitude) > 0 then
					task.wait(1.5)		

					script.Parent.f:MoveTo(oldPos)
					script.Parent.f.MoveToFinished:Wait()

					local tween = game:GetService("TweenService"):Create(script.Parent.HumanoidRootPart, TweenInfo.new(0.2, Enum.EasingStyle.Linear, Enum.EasingDirection.In), {CFrame = CFrame.lookAt(oldPos, Vector3.new(restaurantDestinations.destination1.Position.X, script.Parent.HumanoidRootPart.Position.Y, restaurantDestinations.destination1.Position.Z))})
					tween:Play()
				end
			end

			task.wait(0.01)
		end
	end)
end
Stop back in line function 
local function breakBackInline()
	stopBackInLine = true
	task.wait(0.02)
	stopBackInLine = false
end

Sorry if this is not well explained because I’m not really sure how to explain it. Please ask any questions that you need to.

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