2048 plays on a 4x4 square grid. Each move is a turn, the player uses the arrow keys and the square blocks will slide in one of four corresponding directions (up, down, left, right). Each turn a block of value 2 or 4 will appear randomly in an empty cell on the grid. The squares slide in the specified direction until they reach the edge of the grid or touch another block. If two squares of the same value touch each other, they combine to form a square with a value equal to the sum of those two squares (the double value). The resulting square cannot be combined with another block again in one move. For easy identification, different value squares will have different colors.