Stap 1:
Take a large wrapping paper.
Fold both edges towards each other.

Stap 6:
Prefold over these two lines, use the prefolded lines as guidance, see arrows.

Stap 5:
Prefold the edges to the centerlines.

Stap 2:
Cut off along the edge, into a square.

Stap 4:
Prefold in half over both lines.

Stap 3:
This is the base for the bag.

Stap 10:
Fold into a straight angle, use the prefolded lines as help.

Stap 8:
Fold the edges to the prefolded lines.

Stap 9:
Fold both edges straight upwards.
(Fold over the two white lines if you want the inside of the bag completely white).

Stap 7:
Prefold over these two lines, use the prefolded lines as guidance.

Stap 16:
Curve the strip and glue both ends to the inside of the bag.
Repeat steps 15 and 16 with a second strip.

Stap 15:
Take a long rectangle and fold in half over the length 3 to 4 times.

Stap 12:
Fold both edges towards each other, see small arrow. Do the same on the other side, see large arrow.

Stap 11:
Fold into a straight angle.

Stap 14:
The bag itself is done.....

Stap 13:
Fold the edges on the bottom of the bag towards each other too.