Step 1:
The large rectangular paper is made of two squares taped / glued together.

Step 6:
Fold over these four lines, use the prefolded lines as guidance.

Step 5:
Repeat steps 3 and 4 in this direction.

Step 2:
Prefold in half over these two lines.

Step 4:
Fold the edges to the centerline.
Then, unfold the model.

Step 3:
Fold the edges to the centerline

Step 10:
Turn the model.

Step 8:
Prefold over these four lines, use the prefolded lines as guidance.

Step 9:
Fold the four corners upwards, glue or tape the flaps to the model.

Step 7:
Prefold in half over these two lines.

Step 16:
Fold these two lines into the right direction.

Step 15:
Make these folds along the edge of the black part.

Step 12:
Fold the four flaps to the inside and the lid of the box is done......

Step 11:
Fold the four corners inwards and the four edges straight downwards.

Step 14:
Use the width of the lid as guidance to place this fold.

Step 13:
Fold over these two lines.

Step 21:
Fold / press the edge on the right over the edge on the left.

Step 19:
Tape or glue the four flaps to the model.

Step 20:
Here one flap is taped to the model.

Step 18:
Fold the four corners inwards

Step 17:
Prefold over these two lines.

Step 22:
Repeat step 21 three more times. And mountain-fold over the line on the left.

Step 23:
Tape / glue both edges together, see arrow.