Integer height = 5; // Number of rows
        // Loop for each row
        for (Integer i = 0; i < height; i++) {
            String row = '';
            // Loop for each column (7 columns)
            for (Integer j = 0; j < 7; j++) {
                // Place stars for the "M" shape
                if (j == 0 || j == 6) {
                    row += '*'; // Stars for the sides
                } else if ((i == j && j <= 3) || (i + j == 6 && j >= 3)) {
                    row += '*'; // Stars for the middle diagonals
                } else {
                    row += ' '; // Spaces everywhere else
                }
            }
            System.debug(row); // Print the row
        }

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