The Lilac Chaser
Twelve lilac dots and one gap going round — keep your eyes still and see what the gap becomes.
这个体验还没有翻译，所以文字仍是英文。
玩法
Watch the gap, not the dots
Look only at the cross in the middle. After a few seconds, pay attention to what the gap going round becomes.
- 不到一分钟 · 1 个问题 · 然后是解释
- 这幅会动，或看起来会动。
原理 — 建议试过之后再读
Two effects at once
Where a lilac dot disappears, the tired cells leave a green afterimage in its place, so the gap looks like a green dot running round.
Blurred objects away from where you are looking also fade from view when they hold still, so after a while the lilac dots can vanish entirely.