code: def DoErase(fsm):
      arg = int(fsm.memory.pop())
      screen = fsm.memory[0]
      if arg == 0:
          screen.erase_down()
      elif arg == 1:
          screen.erase_up()
      elif arg == 2:
          screen.erase_screen()
  
imports: from .None import screen
  from .None import FSM
  import string
label_desc: Use image node_id 16 for calling a global function with example usage: DoErase(fsm) without return types