Two wave sources at the right edge whose ripples cross into a moiré, like a ripple tank.

Made as a Kadal Deck premium background, it fills whatever box you give it at its real size, in light and dark, and follows your brand colour (the --deck-accent CSS variable). Settings: speed (how fast the waves travel; 0 freezes them), wavelength (distance between crests in slide pixels) and accent (colour of the waves. A literal CSS colour, or the theme's accent). The animation pauses off screen and in background tabs, and holds still for visitors who ask for reduced motion.

What you get: a web component, one script with no framework, for a plain page, Webflow, WordPress or Framer, drawing behind your own content. A React component. Stills at 2560 x 1440 in light and dark, and transparent ones to lay over a photo. Seamless 10-second loops at 1920 x 1080, MP4 and WebM, for any video editor, and WebMs with transparency for overlays. A demo page to try the settings and print a PDF, and a README with a recipe for each.

In Kadal Deck, buying it unlocks Interference in every workspace you belong to (as background pro/interference). Pro, Team and Lifetime plans include every premium background already.