screen

rednet.open("top")
m = peripheral.wrap("back")
m.clear()
m.setBackgroundColor(colors.black)
m.clear()
x, y = m.getSize()

function getClick()
  while true do
    event, side, x, y =os.pullEvent("monitor_touch")
    return x, y
  end
end

function creatButton(xmin, ymin, xmax, ymax, txt)
  for i = xmin, xmax do
    for k = ymin, ymax do
      m.setCursorPos(i, k)
      m.write(" ")
    end
  end
  m.setCursorPos(xmin+3,ymin+1)
  m.write(txt)
end

m.setBackgroundColor(colors.green)
creatButton(2, 2, 19, 5, "turbine 1 on")
creatButton(53, 2, 70, 5, "turbine 2 on")

function receive(comp, xmin, ymin, xmax, ymax, txt1, txt2)
  id, msg, dist = rednet.receive()
  if id == comp then
    if msg == "on" then
      m.setBackgroundColor(colors.green)
      creatButton(xmin, ymin ,xmax, ymax, txt1)
    else
      m.setBackgroundColor(colors.red)
      creatButton(xmin, ymin , xmax, ymax, txt2)
    end
  end
end