Liquid light

Stir glowing ink with your finger in a calming fluid simulation. A free, satisfying visual toy that runs in your browser on phone or desktop.

How to play

Drag a finger or the mouse across the screen and the glowing ink follows, curling into soft swirls that slowly fade. Tap to drop a fresh splash of color. Slow strokes give a racing mind something gentle to follow.

Questions

Why is watching fluid so relaxing?

Slow, flowing motion is easy to follow and never repeats exactly, so it holds your attention without asking anything of you — like watching smoke, clouds or a lava lamp.

Does it work on a phone?

Yes. It runs on the graphics chip in your browser on phones, tablets and desktops, with touch or a mouse.

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• Zen gardenRake slow lines through soft sand