A fantastic optical illusion by @Chris_Said modified from another illusion from @gsarcone. Observe that that the colored segment always stay of the same length, even though they appear to be changing.
I'm biased here, but this is one of the strongest visual illusions I have ever seen.
None of the colored lines are moving. pic.twitter.com/QcW3u6WFB4
— Chris Said (@Chris_Said) January 3, 2020