The first “4” is the number of points in the polygon, and “0 1 3 2” are the points. The next “4” is for the next polygon, with points “4 6 7 5”.
The first “4” is the number of points in the polygon, and “0 1 3 2” are the points. The next “4” is for the next polygon, with points “4 6 7 5”.