Basic forms (Frog).
Fold the square of the base form of double triangle. Fold one corner, combining the lower side of the line of inflection.
Fold the corner now, combining the side of the line of inflection.
Open and flatten the resulting pocket.
Fold the middle part, combining the lower side of the line of inflection.
Lift the bottom corner of the planned lines. Repeat the same steps (starting with the first) with the three remaining corners.
Fold down the corners raised in each plane.
Lift the corners of the four planes.
The basic form of the Frog is ready. She has a deaf and a drop-down corners, as well as four elongated angle, which are located in various planes.