RUSH ❓❓❓

OK seriously, does anyone know where these melodies come from? i've had them stuck in my head and used them in my songs for quite a while I wanna know. Also, wow! A Rush with an actual original structure at the end! This is not sheet music boss rush e, rush astronomia, rush f, rush g, rush area 51, rush piggies, rush a, rush b, rush c, rush d, rush c#, rush e 2, rush dissonance, impossible piano remix, black midi