Step 1:
One side of this paper is yellow and the other is orange, pink or red.
Prefold in half over these four lines.

Step 6:
Fold the edge downwards.

Step 5:
Prefold over these 2 lines.

Step 2:
First, fold over the 2 lines at the bottom right, then over the 2 diagonal lines. And then over the 2 lines at the top left.

Step 4:
Squash-fold.

Step 3:
Fold / pull one flap upwards.

Step 10:
Prefold over this line

Step 8:
Fold over this line, it's a little below the centerline

Step 9:
Repeat steps 4 to 8 on the other three flaps

Step 7:
Press these edges downwards / flat.

Step 16:
Fold over these two lines, do the same on the other three ends.

Step 15:
The inside of the model should look like this now

Step 12:
Sink fold over the prefolded lines.

Step 11:
Open the model.

Step 14:
Press the model inwards

Step 13:
Sink fold a little further.

Step 18:
Fold the tip backwards over the upper line and to the front over the line below. Repeat four times.

Step 17:
Fold over these two lines, do the same on the other three ends.
Tape / glue the edges below together (if necessary)

Step 19:
Press the tip flat between your fingers. Repeat on the opposite bar.