Ambient · retro
Lava Lamp Clock
Slow-moving blobs and a deep warm glow behind a large digital clock. A lava lamp for a screen: hypnotic, unhurried and never quite repeating.
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Press F for full screen. Motion pauses automatically if your system asks for reduced motion.
The lava lamp
An Object Designed to Be Watched
How the Real Thing Works
A wax blend slightly denser than the surrounding liquid sits at the bottom until a bulb warms it. Warm wax expands, becomes less dense, rises, cools at the top and sinks again. The cycle never repeats exactly because the blobs merge and split at random.
Invented in 1963
Edward Craven Walker patented the design in Britain after seeing a home-made egg timer in a pub. It became a fixture of the decade that followed and has come back into fashion several times since.
Why It Holds Attention
The motion is slow enough to follow and irregular enough that you cannot predict it. That combination is unusually good at occupying the part of your attention that would otherwise wander, which is why it works as background rather than as entertainment.
Lava Lamps and Random Numbers
A wall of lava lamps filmed by a camera is used by one internet infrastructure company as a source of physical randomness for cryptographic keys. The fluid motion is genuinely unpredictable, which is a rare and useful property.
Under the hood
How This Scene Is Built
The blobs are radial gradients rising and falling on independent cycles of seven to sixteen seconds, each with its own delay and scale. Because the durations do not divide evenly into one another, the overall pattern takes a very long time to repeat.
The colour scheme runs deep red through orange to yellow, which makes it one of the warmer scenes here and reasonable to leave on late in the evening. For adjustable warm light with no motion at all, the night light gives you direct control.
Answers
Lava Lamp Background Questions
Does it repeat?
Eventually, but not quickly. Each blob runs on its own cycle length, and because those lengths do not divide neatly into one another the combined pattern takes a very long time to come back round.
Why is a lava lamp so watchable?
Slow, smooth motion that you cannot quite predict. Fast movement demands attention and perfectly regular movement gets ignored; a lava lamp sits between the two, which is exactly where a background wants to be.
Is it too bright for evening use?
It is warm rather than blue, so it is gentler than most screen content late at night. Turning your display brightness down helps more than changing scene.
Can I change the colours?
Not on this page. The night light gives you a full colour picker if what you want is a specific shade rather than the lava motion.
Is it heavy to run?
It is a handful of blurred gradients, so no. The blob count drops on small screens automatically.