Step 1:The backside of the paper is completely white.
Prefold over these 4 lines, then turn the paper.
Step 2:
First make a valley-fold over the 2 lines at the bottom-right.
Then make a mountain-fold over the 2 lines in the middle.
And make a valley-fold over the 2 lines at the top-left.
Step 3:
Make a valley-fold over these 2 lines.
Step 4:
Unfold the folds of step 3
Step 5:
Pull the end at the bottom of the arrow upwards
by making a valley-fold over the purple line.
Step 6:
Press the edges downwards from above, see arrows.
Step 7:
Repeat steps 3 to 6 on the backside of the model
Step 8:
Turn the model
Step 9:
Fold the flap above the purple line downwards
by making a valley-fold over this line.
Step 10:
Mountain-fold over this line.
(fold the tip to the line indicated by the arrow below)
Step 11:
Fold the model in half over this line.
Then, turn the model.
Step 12:
Make an inside reverse fold over these 3 lines
(=mountain-fold over the line on the left and
valley-fold over the 2 short lines on the right)
Step 13:
Valley-fold the end to the inside of the model.
Step 14:
Open the model on the place indicated by the arrow.
Step 15:
Pull the end upwards by making an inside reverse fold
over these 3 lines.
Step 16:
Open the model on the place indicated by the arrow.
Step 17:
Pull this end upwards too by making an inside reverse fold
over these lines.
Step 18:
Now the model looks like this.
Done!
