int main() {

    while(!start_button());
    while(!stop_button()) {
        if(digital(10)) {
            printf("Left Sensor Triggered\n");
            fd(3);
            bk(1);
            sleep(0.2);
            while(!digital(10));
            off(3);
            off(1);
            sleep(0.2);
        }
        if(digital(11)) {
            printf("Right Sensor Triggered\n");
            fd(1);
            bk(3);
            sleep(0.2);
            while(!digital(11));
            off(3);
            off(1);
            sleep(0.2);
        }
    }
    return 0;
}