Hello,

there are several ways how you could do this with a ProfiLux-controller:

- Timers/processes:
* cyclic timer
set the on-off switch times like
switch1 on: 1s
switch1 off: 10s

switch2 on: 11s
switch2 off: 20s

- Programmable Logic
Define a gate that depends on your switch1 channel and invert it.

- Stream groups with an alternating pattern, which you can read more of in this article:
https://www.aquariumcomputer.com/pro...-making-waves/


For further reading have a look at the programming guides:
https://www.aquariumcomputer.com/dow...g-guide-v7-02/
https://www.reef2reef.com/threads/ne...ilux-4.502135/