Why is my part disappearing?

local cleaver = script.Parent
local handle = cleaver.Parent.WheelHandle
local x = 8

function CleaverActivate()
	repeat
		cleaver.Position = Vector3.new(-26, x, -26.5)
	wait(0.000125)
	x = x-0.1
	until x == 4
	x=4
	repeat
		cleaver.Position = Vector3.new(-26, x, -26.5)
		wait(0.625)
		x = x+0.1
	until x == 8.4
end

handle.Touched:connect(function(p)
	if p.Parent:FindFirstChild("Humanoid") then
		CleaverActivate()
	end
end)

I don't know what's wrong.