timer = 0;
con = 0;
x1 = 0;
y2 = 0;
tile_grid[11][7] = 0;
index = 0;
depth = 1000000;
tile_grid[0][0] = 1;
tile_grid[0][1] = 1;
tile_grid[0][2] = 1;
tile_grid[0][3] = 1;
tile_grid[0][4] = 1;
tile_grid[0][5] = 1;
tile_grid[0][6] = 1;
tile_grid[0][7] = 1;
tile_grid[11][0] = 1;
tile_grid[11][1] = 1;
tile_grid[11][2] = 1;
tile_grid[11][3] = 1;
tile_grid[11][4] = 1;
tile_grid[11][5] = 1;
tile_grid[11][6] = 1;
tile_grid[11][7] = 1;
tile_grid[1][0] = 1;
tile_grid[2][0] = 1;
tile_grid[3][0] = 1;
tile_grid[4][0] = 1;
tile_grid[5][0] = 1;
tile_grid[6][0] = 1;
tile_grid[7][0] = 1;
tile_grid[8][0] = 1;
tile_grid[9][0] = 1;
tile_grid[10][0] = 1;
tile_grid[11][0] = 1;
tile_grid[1][7] = 1;
tile_grid[2][7] = 1;
tile_grid[3][7] = 1;
tile_grid[4][7] = 1;
tile_grid[5][7] = 1;
tile_grid[6][7] = 1;
tile_grid[7][7] = 1;
tile_grid[8][7] = 1;
tile_grid[9][7] = 1;
tile_grid[10][7] = 1;
tile_grid[11][7] = 1;
tile_grid[1][1] = 1;
tile_grid[2][3] = 1;
tile_grid[2][5] = 1;
tile_grid[3][2] = 1;
tile_grid[4][4] = 1;
tile_grid[4][5] = 1;
tile_grid[5][2] = 1;
tile_grid[6][5] = 1;
tile_grid[7][2] = 1;
tile_grid[7][3] = 1;
tile_grid[8][5] = 1;
tile_grid[9][2] = 1;
tile_grid[9][4] = 1;
tile_grid[10][6] = 1;