public void earsePoint a Point b mapaxay = 0; mapbxby = 0; restBlock -= 2;

This method is used to erase (remove) two points from the map and update the remaining number of blocks.

The method takes two arguments:

1. Point a: the first point to be erased.
2. Point b: the second point to be erased.

The method sets the value at the position of point a and point b to 0 (which represents an empty space) on the map array. It then subtracts 2 from the restBlock variable, which keeps track of the number of remaining blocks on the map.

Overall, this method appears to be used in a game or simulation where the map is being updated dynamically