Step 1:The other side of this paper is completely black.
Prefold over this line (=valley-fold)
Step 2:
Make a valley-fold over this line.
Step 3:
Prefold the model over this line (=mountain-fold).
Then, turn the model.
Step 4:
Make a valley-fold over these 2 lines.
Step 5:
Make a valley-fold over these 2 lines.
Step 6:
Make a valley-fold over this line.
Step 7:
Make an inside reverse fold over the 3 red lines.
A valley-fold over the short green line is automatically
made when you are making these folds.
Step 8:
The 2 yellow arrows show the same corners as the arrows
in step 7.
Press these 2 corners completely against each other
to make sharper folding lines.
Step 9:
The model looks like this from aside.
Fold the edge below the red line to the inside of the model
by making a mountain-fold over this red line.
The corner indicated by the arrow is pulled upwards when
you are making this fold.
Make the same fold on the other side of the model.
Step 10:
Make a mountain-fold over this line, make the same fold
on the other side of the model.
Step 11:
Now the model looks like this.
Step 12:
Fold the corner indicated by the arrow to the outside of
the model by making a valley-fold over the red line line.
Make this fold over all loose layers.
Make the same fold on the other side.
Step 13:
This arrow shows the same corner as the arrow in step 12
Step 14:
Press the 2 corners against each other first. Then, lock them
together by making a valley-fold over the red line.
Step 15:
Press the edge indicated by the arrow inwards a little.
Do the same with the edge on the other side of the model.
Step 16:
Press the edge indicated by these 2 arrows inwards a little too.
Do the same with the edge on the other side.
Done!
