local state = false
term.setBackgroundColor(colors.red)
term.clear()
rs.setOutput("back", true)

function main()
	while true do
		if state then
			term.setBackgroundColor(colors.green)
			term.clear()
			rs.setOutput("back", false)
			turtle.attack()
		elseif not state then
			term.setBackgroundColor(colors.red)
			term.clear()
			rs.setOutput("back", true)
		end
		os.sleep(.1)
	end
end

function swap()
	repeat
		local ev, b, x, y = os.pullEvent("mouse_click")
	until b
	state = not state
	return
end

while true do
	parallel.waitForAny(main, swap)
	os.sleep(.1)
end