sleeptime = 30
input = "right"
output = "left"

counter = sleeptime
mon = peripheral.wrap("top")
mon.setTextScale(1)
mon.clear()

while true do
	if redstone.getInput(input) then
		counter = sleeptime
		while counter > 0 do
			mon.clear()
			mon.setCursorPos(1,3)
			mon.write(string.format("%2d", counter))
			sleep(1)
			counter = counter - 1
		end
		mon.clear()
		redstone.setOutput(output, true)
		sleep(0.2)
		redstone.setOutput(output, false)
	end
	sleep(0.5)
end