Code

public static void run(JSONObject jsonObj, PrintStream out)
    {
        Board board = Board.initializeBoardFromJSON(jsonObj);
	int max = 0;
	Block bestBlock = null;
	for(int i = 1; i < 4; i++){
        	// the following "AI" moves a piece as far left as possible
      	  	while (board._block.checkedLeft(board)) {
       	     		out.println("left");
           	}
		boolean run = true;
		while(run){
			while(board._block.checkedDown(board)){
				out.println("down");
			}
			if(checkEdges(board) > max){
				max = checkEdges(board);
				bestBlock = board._block;
			}
			while(!board._block.checkedRight(board)){
				if(checkAtTop(board)){
					run = false;
				} else {
					out.println("up");
				}
			}
			if(board._block.checkedRight(board)){
				out.println("right");
			}
		}
		out.println("rotate");
	}
    }
    public static boolean checkAtTop(Board board){
	for (Point square : block.squares()) {
		if (square.i < 0 || square.i >= ROWS - 1 ||
			square.j < 0 || square.j >= COLS ||
			_bitmap[square.i][square.j] != 0)
			return false;
	}
	return true;

    }