After rewriting this thing like 4 times with the help of countless forum members (thanks to all) it's done. If you google around for reef lighting that has a thunderstorm or lightning storm mode you will see that almost 99% of them use blink. Which is ok I guess but it looks cheesy to me. I found on…

Saltwater reef tank LED light with lightning storm.

prasadwad September 29, 2015, 1:10pm 2

How would this work in a controller setup? wouldn't the delay stop all other processing ?

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