Origami Checkerboard


#28

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

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