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Oscilloscope Lissajous
A phosphor oscilloscope traces a 3:2 Lissajous figure: two nested sine-eased loops drive the beam, six afterglow dots fade behind it and the whole figure lingers faintly on the screen.
Also known as: oscilloscope animation css, lissajous curve loader, phosphor screen animation, signal trace loader.
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Customizing this loader
- Color: set
--ldr-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--ldr-size. Every dimension in the snippet is derived from it. Currently previewing64px. - Speed: change the duration on the
animationshorthand. Delays on the children are relative, so they keep their rhythm. - Accessibility: the root carries
role="status"and anaria-labelso screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.