Fold up the top flap on the open end, so that the tip
of the lower flap reaches the tip of upper flap...
Fold two of the flaps over and repeat step 18 for the
other lower flap.
Fold one flap over and lay flat...
...to get this.
.Fold the top flap down...
....to get this.
Flip the paper over and repeat step 21 for the other
Origami by Aidan Dysert