Origami Checkerboard


#13

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

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