You can drag that points. SPACE - start script A, B and C points - triangle tops Small point - start point Watch this video (optional): https://www.youtube.com/watch?v=kbKtFN71Lfs
The sctipt of Sierpinski Triangle, a fractal based on a triangle with four equal triangles inscribed in it. The central triangle is removed and each of the other three treated as the original was, and so on, creating an infinite regression in a finite space.