Newbie, created Word Clock, but time is not accurate (clock is slow)

[david_2018]

@johnwasser

You could reduce the drift by calculating how often the clock drifts a second and adjusting the clock periodically.

Unlikely to work in this case, because FastLED is blocking the interrupt for the millis counter, and then adjusting the millis count for its estimate of how much time was lost. That results in a highly inaccurate millis count.