Origami Checkerboard


#32

Legend
Valley folding
Mountain folding
0.
     ←
 □□□□
 □□□□
 □□□□
 □□□□
    
1.
 □□■
 □□■
 □□■ 
 □□■
↑
2.
 □□■
 □□■
 ■■■

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