(１８)
The yellow lines are which you have made.
Put the paper like this picture.
(１９)
The yellow line is the second crease from the top.
The light blue line is the third crease from the top.
Make a mountain-fold on the light blue line.
Then fold the light blue line to the yellow line to make a valley-fold at the dotted line.
(２０)
This picture is halfway through.
Make a mountain-fold like this picture.
Then fold it to the yellow line.
(２１)
Fold the paper like this picture.
(２２)
After making a valley-fold, turn the paper over.
(２３)
The blue lines are which you have made.
Put the paper like this picture.
(２４)
Fold the bottom to the first crease from the top.
(２５)
Fold the paper like this picture.
(２６)
Then fold the bottom to the crease which you have made in the previous step to make a crease at the dotted line.
(２７)
Fold the paper like this picture.
(２８)
Then fold the bottom to the first crease from the top again.
(２９)
Fold the paper like this picture.
Then fold the bottom to the crease of the flap to make a crease at the dotted line.
(３０)
Fold the paper like this picture.
(３１)
After making a crease, spread the paper.
(３２)
The yellow lines are which you have made.
Put the paper like this picture.
(３３)
Then cut the paper on the yellow lines.
(３４)
After cutting the paper, it looks like this picture.
Preparing an origami paper is completed!
