About the Frost Timer
Ice creeps in from the edges of the screen as time runs out — fingers and blobs of frost growing inward from the perimeter, exactly like real frost on a windowpane. The centre is the last to freeze over.
How It Works
The simulation seeds every cell along the canvas perimeter, then uses the Eden growth model to add adjacent cells one at a time in random order. Because the seeds appear in a shuffled order rather than a clean sweep, the frame doesn't fill as a tidy rectangle — you get a ragged, organic creep inward. The middle of the screen freezes over last.
Perfect For
- Atmospheric countdowns — winter aesthetic, calming pace
- Focus sessions — visual change is gradual and never sudden
- Sensory rooms — slow, hypnotic creep
- Holiday season displays — winter-themed visual
FAQ
Why does the centre fill last?
The growth starts at the perimeter and moves inward. Cells in the middle are the farthest from any seed, so they're reached last.
Why doesn't it look like a clean rectangle shrinking?
The perimeter seeds appear in random order and the inward growth picks random boundary cells. That gives the frost its irregular fingers instead of a uniform border.
Is the frost timer free?
Yes — free, no signup. Runs in any modern browser.
Can I run it in fullscreen?
Yes. Tap the Fullscreen button; press Esc to exit.