I learned something interesting from a comment on the post: "I was a neuro tech for a long time, doing tests for epilepsy. A 1Hz blink can trigger a seizure, b

I learned something interesting from a comment on the post: "I was a neuro tech for a long time, doing tests for epilepsy. A 1Hz blink can trigger a seizure, but only in a vanishingly small number of epileptics and only if it's sustained - photosensitive epileptics (far from all epileptics) usually need at least 8-10Hz strobing before epileptic activity rises. The common range is ~12-16. All this being said, have a 3:1 duty cycle is better UX anyway - the blink off works as the attention-grabbing highlight, and the longer duration on allows what's highlighted to be more easily read." Looks like you don't need to worry :-D