{

Grid();

int at(unsigned x, unsigned y) {

return _data[(y * GRID_WIDTH) + x];

};

void set(unsigned x, unsigned y, int val) {

_data[(y * GRID_WIDTH) + x] = val;

}

int width() { return GRID_WIDTH; };

int height() { return GRID_HEIGHT; };

void copy(Grid &other_grid);

void draw(Arduboy& adb, const unsigned x, const unsigned y);

bool actor_collides(const shape_actor_t& actor);

void commit_actor(const shape_actor_t& actor);

/// Returns number of lines cleared

unsigned int clear_lines();

void reset();

int _data[GRID_SIZE];

void _shift_down(unsigned int from_line);