How to fold the purple symbol

The purple symbol folds the left and right corners in the middle to form a triangle. Choose one side and fold an oblique triangle. Choose two points and fold them into a golden triangle. Make a two-point and one-line upward fold. Slant to the left. Repeat the operation according to steps 1 to 4 until it can no longer be folded. The remaining small sides can be folded into a small angle and then into a triangle.