# Skully colour drift

**URL:** <https://forums.pimoroni.com/t/skully-colour-drift/20731>\
**Category:** Support\
**Created:** [November 15, 2022, 12:27pm UTC](https://forums.pimoroni.com/t/skully-colour-drift/20731 "2022-11-15T12:27:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ESpy](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@ESpy](https://forums.pimoroni.com/u/ESpy)\
**Post date:** [November 15, 2022, 12:27pm UTC](https://forums.pimoroni.com/t/skully-colour-drift/20731/1 "2022-11-15T12:27:27Z")

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I’ve noticed a couple of times that when Skully (Neopixel string + Plasma stick) running the supplied code is left on for a reasonable length of time (~10 hours), the colour drifts to red with some occasional flickering. Power off for about a minute, then power on again and it goes back to the green/orange cycle (short power cycle doesn’t fix things).

I’ve checked the temp of the LEDs in the bottle; they’re peaking at about 23C. The plasma stick doesn’t seem unduly warm (and a minute off wouldn’t cool things that much) so I think thermal issues are off the table. The connections all seem sound and I think I can dismiss a wire break as a root cause (famous last words!).

Timing, perhaps? I’ve not looked at the code yet (nor have I put an analyser onto the bus), but my current guess is that the Pico may be drifting out-of-spec for the LED comms.

Any thoughts?