clock

local monitor = peripheral.wrap( "top" )
monitor.clear()
monitor.setTextScale(2)
monitor.setCursorPos(1,4)
monitor.write("Welcome to blablabla")

while true do
  monitor.setCursorPos(1,2)
  monitor.clearLine()
  local MCTime = textutils.formatTime(os.time(), false )
  monitor.write(MCTime)
  sleep(.5)
end