Origami Checkerboard


#17

Legend
Valley folding
Mountain folding
0.
      →
 □□□□□
 □□□□□
 □□□□□
 □□□□□
 □□□□□
     
1.
↓
 □□□□ 
 □□□□
 □□□□
 □□□□
 □□□□
2.
← 
 ■■■□
 □□□□
 □□□□
 □□□□
  
3.
  ■■□
  □□□
  □□□ 
  □□□
 ↑
4.
  ■■□
  □□□
  □■□

Nov 23, 2004 by k16@chiba.email.ne.jp