Flat Four-Petal Violet

Crease the square into quarters, bring the long edges inward and open the end pockets into the boat-like form shown.

Fold the end flaps outward one at a time, turning the model as needed, until the four pinwheel arms are visible.

Fold the small inner edges of each arm inward, following the four-panel sequence around the center.

Fold the pointed outer corners behind. Turn over and flatten the four broad petal faces.

Fold the remaining small edges inward around the middle, then adjust each rounded petal.