1020 -10 -10 
-20 -10 -10 
-20  10 -10 
 20  10 -10 
 20 -10 -10 
 20 -10  10 
 20  10  10 
 20  20  0 
 20  10 -10 
 20  10  10 
-20  10  10 
-20 -10  10 
 20 -10  10 
 20  10  10 
-1020 -10  10 
-20 -10 -10 
-1020  10  10 
-20  10 -10 
-20  20  0 
-20  10  10 
-1020  20  0 
 20  20  0 
 1020 -10 -5 
 20  0 -5 
 20  0  5 
 20 -10  5