text: from tkinter import *
  print('dobian 2.1.0 system')
  
  while 1:
      a=input('C:\doubi>')
      if a=='pip install doubi':
          print(''' Collecting doubi.
          |████████████████████████████████|12kb/12kb
          doubi done.
  You are using cmd 2.1.0.However,vision2.1.1is available.''')
      elif a=='shutdown':
          r=Tk('300x30')
          l1=Label(r,text='Dobian将在10秒后关闭。')
          l1.pack()
          b1=Button(r,text='确定')
          b1.pack()
  
      else:
          print('哈哈哈，你上当了！🤪🤪🤪')
  