def draw(self, canvas):
    for y in range(len(self._grid)):
        for x in range(len(self._grid[y])):
            self._grid[y][x].drawBlock(canvas)
def draw(self, canvas):
    for y in range(len(self._grid)):
        for x in range(len(self._grid[y])):
            self._grid[y][x].drawBlock(canvas)