public static void main(String[] args) {
        // main method block
        int x = 0;
        if (x == 0) {
            // then block
            int y;
        } else {
            // else block
            int y;
        }
        while (x++ < 10) {
            // while loop block
            int y;
        }
        for (x = 1; x < 10; x++) {
            int y;
        }
        {
            //free block
            int y;
        }
    }