Put a square a rhombus and humus on the diagonal. Side bend angles to the line of inflection.
Fold the piece in half (from myself), turn the product.
Corner bend, as shown in the diagram. Repeat step with the other side.
Bent corners (both sides) need to bend again, now over.
Remove the angle, to form a beak.
Bottom corner bend inward figures.
You can paint a penguin.