test.cc

void rotate () {
    int l_size = sizeof(leds)/sizeof(*leds);
    int first_five = leds[0] >> 3;
    int five_leds = 0;
    for (int i = 1; i < l_size; ++i) {
       five_leds = leds[i] >> 3;
        leds[i-1] = ( ( leds[i-1] << 5 ) & 0b11100000 ) | five_leds;
        cout << leds[i-1] << "\n";
    }
    leds[l_size-1] = ( ( leds[l_size-1] << 5 ) & 0b11100000 ) | first_five;
    cout << leds[l_size-1] << "\n";
}