(２２)
Put the paper like this picture.
Then make a mountain-fold on the dotted line and move the left and right to the center.
(２３)
Make a mountain-fold and move the left and right like this picture.
Then fold the flap in the direction of the arrow.
(２４)
Fold the flap like this picture.
Then make creases at the dotted lines.
(２５)
Fold the paper like this picture.
(Fold the bottom right edge to the diagonal crease.)
(２６)
On the other side, fold the paper like this picture.
(Fold the bottom left edge to the diagonal crease.)
(２７)
After making creases, turn the paper over in a horizontal direction.
(２８)
There are the creases, which you have made in the previous steps, on the bottom because you turn the paper over in a horizontal direction.
Fold the bottom edges to the diagonal creases.
(２９)
Fold the bottom edges like this picture.
Then make creases at the dotted lines.
(３０)
Fold the paper like this picture.
(Fold the bottom to the left edge of a triangle.)
(３１)
On the other side, fold the paper like this picture.
(Fold the bottom to the right edge of a triangle.)
(３２)
After making creases, turn the paper over as it is.
(３３)
After turning the paper over, make creases on the dotted lines, which you have made in the previous steps, one more time.
(３４)
Fold the paper like this picture.
(Fold the bottom to the diagonal crease.)
(３５)
On the other side, fold the paper like this picture.
(Fold the bottom to the diagonal crease.)
(３６)
After making creases, unfold the bottom part.
(３７)
Unfold the bottom part like this picture.
(３８)
Then fold the right to the left on the dotted line.
(３９)
Fold the paper like this picture.
Then rotate the paper 90 degrees to the right.
