const initialTileCount = tiles.length;
 for (let i = 0; i < initialTileCount; i++) {
 let tempTiles = [];
 for (let j = 0; j < 4; j++) {
 tempTiles.push(tiles[i].rotate(j));
 }
 tempTiles = removeDuplicatedTiles(tempTiles);
 tiles = tiles.concat(tempTiles);
 }
 console.log(tiles.length);