Simple application, lets call it "flashlight-ultra", which would repeatedly light diodes in "flash" mode, and a small slider that would control frequency of stroboscopic effect.
Again, It's just a wild idea, and I know you're, probably, already pretty busy with Pierogi - it's just something that I thought might be useful for some people. Maybe good candidate for upcoming Coding Competition, too?
Just be aware, that if you decide to do it, you're, probably, going to get feature request of programmable morse code blinker, pretty soon