btn:    my_delay(200);
    if(PINB){
        my_delay(10);
        if(PINB){
            while(!PINB) {
                if(i<9){
                    i++;
                }
                goto btn;
            }
        }
    }

 ---
  |
  |
  |
  V

int flag = 1;
while (flag) {
    flag = 0;
    my_delay(200);
    if (PINB) {
        my_delay(10);
        if (PINB) {
            while (!PINB) {
                if (i<9)
                    i++;
                flag = 1;
            }
        }
    }
}