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Phosphor Lissajous Scope
A bright beam draws a 3:2 Lissajous figure on an oscilloscope graticule, its phosphor trail fading behind it, while the phase drifts so the figure turns from a knot to an arch and back.
Also known as: oscilloscope background css, lissajous curve animation, phosphor trace css, signal scope background.
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Customizing this snippet
- Color: set
--bgx-coloron the element or a parent. Currently previewing#3b82f6. - Pattern scale: set
--bgx-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.