lock

local txt = "Lockdown"

monitor_side = "back"
modem_side = "left"

mon = peripheral.wrap(monitor_side)
mon.setTextScale(3)
x, y = mon.getSize()

function writeCenter(text)
  return (x-string.len(text))/2 + 1
end
function m_write(text,color)
  mon.setBackgroundColor(color)
  mon.clear()
  mon.setCursorPos(writeCenter(text),2)
  mon.write(text)
end
local run = true
local currentColor = colors.green
m_write(txt,currentColor)

while(run) do
  side, monX, monY = os.pullEvent("monitor_touch")
  if(currentColor == colors.green) then
     currentColor = colors.red
  else
    currentColor = colors.green
  end
  m_write(txt,currentColor)


end