startup

os.loadAPI("button")
m = peripheral.wrap("top")
m.clear()
local btn = "TOGGLE BRIDGE"

function fillTable()
  button.setTable(btn, bridge, "", 1, 18, 1, 5)
  button.screen()
end

function getClick()
  event,side,x,y = os.pullEvent("monitor_touch")
  button.checkxy(x,y)
end

function setOutput(arg)
  if arg then
    print("Opening bridge...")
  else
    print("Closing bridge...")
  end
  redstone.setOutput("left", arg)
end

function bridge(arg)
  button.toggleButton(btn)
  setOutput(button.button[btn]["active"])
end

redstone.getSides()
fillTable()
while true do
  getClick()
end