I/O redstone

local mon = peripheral.find("monitor")
mon.setBackgroundColour(colours.black)
mon.clear()
while true do
  mon.setCursorPos(3, 3)
  mon.write("I/O")
  event, side, x, y = os.pullEvent ("monitor_touch")
  if x > 2 and x < 6 and y == 3 then
      mon.setBackgroundColor(colors.black)
      mon.clearLine()
      mon.setCursorPos(3, 3)
      mon.setBackgroundColor(colors.green)
      mon.write("I/O")
      mon.setBackgroundColor(colors.black)
      rs.setOutput("back", true)

  end
  event, side, x1, y1 = os.pullEvent ("monitor_touch")
    if x1 > 2 and x1 < 6 and y1 == 3 then
      mon.setBackgroundColor(colors.black)
      mon.setCursorPos(3, 3)
      mon.write("I/O")
      mon.setBackgroundColor(colors.red)
      rs.setOutput("back", false)
    end
end