If you don't know what to do, apply a series, someone once advised me. For the uninitiated, in brief: a series is an invention that was meant to help music out of a crisis a hundred years ago; to provide material for centuries of further development and growth. The series is based on using the pitches of the chromatic scale not, as before, based on so-called tonal organisation, but as sequences arranged in various ingenious ways, adhering to one overarching principle: not to repeat any pitch (gradually also other elements) until all have appeared. This concept, despite its not very exciting premises, made a remarkable career and indeed shaped the sound of music for long decades. It put some into ecstasy, others into nausea. It also developed in various directions, but I won't talk about that, as it's nothing overly interesting. Regarding the crisis, I prefer to think of it in its original meaning - not as a problem, but as a breakthrough. And essentially as a definition of existence at all - a constant turning point; becoming through eternal change.

Returning to the advice, I'm not a fan of it. I prefer another: if you don't know what to do, that's good, because no one knows, and if someone says they know, or that it was once known, don't believe it. Just do anything and move on.

However, there's something in the series that still attracts me. Something compels me to avoid repetitions (in melodic microstructures, in other areas not really). There is something noble in it. So, I've constructed a series (not without a certain order), and I'm moving on.