···       
    l·······▒    
   ···········   
  ▒·♣♣♣♣♣♣♣♣♣··  
  ▒·♣ff··ff··♣·· 
 ▒▒·♣ff··f···♣·· 
 ···♣··ff···f♣·· 
····♣··f···ff♣···
····♣ff·<·f··♣···
····♣f···ff··♣···
 ···♣···f··ff♣·▒ 
 ···♣··ff··ff♣·· 
 ····♣♣♣♣♣♣♣♣♣·▒ 
  ▒············  
   ▒▒▒▒▒·····▒   
       ▒▒▒▒▒▒