Step 8
: Turn back.
Step 9
: Unfold the triangle（uppermost layer）as shown below.
Step 10
: Fold the left corner to right along the dotted line.
Step 11
: Fold again along the dotted line.
Step 12
: Turn back as shown below.
Step 13
: Fold in half by folding the top corner to the bottom corner along the dotted line.
Step 14
: Fold in half by folding the bottom right corner to the upper left corner along the dotted line.
Step 15
: Make a crease,fold the upper right corner down along the dotted line,
then unfold.
Step 16
: Make an inside reverse fold as shonw below.
