Fold on diagonal.

Unfold, rotate 90°. Fold on diagonal.

Turn over, fold 2 corners down to midpoint.

Fold in 1/2.

Notice fold on diagonal 1/2 way up folded edge.

This is the fold we will use next.

Push in on lower corner until it folds in making parallelogram. This is a completed module. Make 8.

Insert 1 module into other module.

Fold corners into second module.

Repeat on 8 pieces using all 4 colors before repeating color pattern.

Gently jostle pieces to open or close. Enjoy.