private static void makeTet7(SquareColor[][] tet) {
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 4; j++) {
                if (((i == 1 || i == 2) && j == 1) || ((i == 2 || i == 3) && j == 0)) {
                    tet[i][j] = SquareColor.YELLOW;
                } else tet[i][j] = null;
            }
        }
    }