while true do
	term.setCursorPos(1,1)
	term.setBackgroundColor(colors.black)
	term.clear()
	print("Please enter program to run:")
	local programToRun = read()
	print("Please enter window X pos:")
	local windowXpos = read()
	print("Please enter window Y pos:")
	local windowYpos = read()

	if tonumber(windowXpos) == nil then
		error("windowXpos is invalid")
	end
	if tonumber(windowYpos) == nil then
		error("windowYpos is invalid")
	end
	if not fs.exists(programToRun) then
		error("programToRun is invalid")
	end
end