这个图相信很多人都认识  


        ..------..              
  /~~-.-~__-'`-__  ~-.  .-~-.        
 |   /~~~\     / ~~---\|     |        
 |  ||| * |   | | |  * |     |        
 /_-|\ \ /     \ \ \__.|\.  |        
 ~   \~~   |_|   ~~~~ /   ~-.\        
      ~-.._      _.-~~           
        .--~~~~~~--.        
       |  |______|  |        
        ~-|______|-~        
          |      |         
          |______|        
          |  |   |        
          |__|___|        
          |_|| _||        
          `--'`--'