button

monitor=peripheral.wrap("front")
mouseWidth = 0
mouseHeight = 0

function prepare()
  monitor.clear()
  monitor.setBackgroundColor((colors.black))
  monitor.setCursorPos(1,1)
  monitor.setTextColor((colors.white))
  monitor.write("water")
  monitor.setCursorPos(1,2)
  monitor.write("cooling")
end

function on()
  prepare()
  monitor.setCursorPos(2,4)
  monitor.setBackgroundColor((colors.green))
  monitor.write("  on   ")
end

function off()
  prepare()
  monitor.setCursorPos(2,4)
  monitor.setBackgroundColor((colors.red))
  monitor.write("  off  ")
end

function ClickOn()
  if mouseWidth > 1 and mouseWidth < 9 and mouseHeight == 4 then
    rs.setOutput("back", false)
  end
end

function ClickOff()
  if mouseWidth > 1 and mouseWidth < 9 and mouseHeight == 4 then
    rs.setOutput("back", true)
  end
end

function checkOff()
  event,p1,p2,p3 = os.pullEvent()
    if event == "monitor_touch" then
      mouseWidth = p2
      mouseHeight = p3
      ClickOff()
      return "aan"
    end
end

function checkOn()
  event,p1,p2,p3 = os.pullEvent()
    if event == "monitor_touch" then
      mouseWidth = p2
      mouseHeight = p3
      ClickOn()
      return "aan"
    end
end

while true do
   prepare()
   off()
  repeat
    checkOff()
  until
    checkOff() == "aan"

  prepare()
  on()
  repeat
        checkOn()
  until
        checkOn() == "aan"
end