ME-System Lua 2.0

    os.loadAPI("button")
    local m = peripheral.wrap("back")
    local mx, my = m.getSize()
    function getClick()
      local event, side, x, y = os.pullEvent()
      if event == "monitor_touch" then
        button.checkxy(x, y)
      end
    end
    function schutz()
      addText()
      --button.toggleButton("Schutz")
      if button.active("Schutz") then
       -- print("now on")
        rs.setOutput("left", false)
        button.setName("Schutz", "ME-System Aus!")
      else
       -- print("now off")
        rs.setOutput("left", true)
        button.standby()
        button.setName("Schutz", "ME-System An!")
      end
      button.toggleButton("Schutz")
      button.save()
      addText()
    end
    function fillMainTable()
      m.clear()
      addText()
      button.clearTable()
      button.setTable("Schutz", schutz, "", 2, mx-1, 2, my-1, "ME-System Aus!")
      button.screen()
    end
    function addText()
      local text = "ME-System"
      local mx, my = m.getSize()
      m.setBackgroundColor(colors.black)
      m.setCursorPos((mx/2-#text/2)+1 , 1)
      m.write(text)
    end
    addText()
    fillMainTable()
    button.load()
    while true do
      getClick()
    end