I built a light sequence using HLS (my first one). Its just pixels chasing to a beat.
But, I need the to move faster and continue to the end after the beat stops.

Its laser shooting sound and the lights need to move faster, and not disappear after the sound stops (chase to the end).
I'm using LED Strip Lights (WS2811) 300 pixels per string, 3 strings (900 pixels).

This is for a Halloween display.