0.0 -7.0 
     0.0 -2.0 
    -3.0 -2.0 
    -3.0 -7.0 
     6.0 -7.0 
     6.0  2.0 
     7.0  1.0 
     0.0  8.0 
    -7.0  1.0 
    -6.0  2.0 
    -6.0 -7.0