Origami Scaled Octahedron (easy - modular)

Origami tutorial. How to make a Modular Scaled Octahedron, with square papers. Difficulty : ★ ★ ☆ ☆ ☆ (easy) Used : 6x 5x5 cm, 6x 10x10 cm, 6x 15x15 cm, 12x  ...  cm 80 gr plain paper. ..................................................................