Forbidden Planet Style Self Oscillating by spacedrifter1961
The above settings will produce an ambient soundscape, sometimes calm, sometimes dark and aggressive. Possibly Krell - I have not heard it repeat itself.
To intervene, subtle tweaks of the VCF frequency, Mod and Env depth, Delay time and repeats will add further spice. No sequencer or input needed. Runs by itself.
Youtube channel - spacedrifter1961