Wave Background

Soft blurred bands of color drift like an aurora behind content.

Add an "Aurora Background" (also called a northern lights gradient) to [where].
Soft, blurry bands of color should drift and sway slowly behind the content, overlapping and blending like northern lights: very slow and dreamy.
Keep the text on top readable, avoid re-blurring the bands on every frame so it stays smooth, and stop the drift for users who prefer reduced motion.

A glowing pulse travels along a line connecting two elements.

Add an "Animated Beam" effect (also called a connecting beam) to [where].
A short glowing pulse should travel along the line that connects two elements, moving steadily from one end to the other and then starting again: smooth and calm.
Keep the connecting line itself visible at all times, and hold the pulse still for users who prefer reduced motion.

Colors in a gradient background slowly shift, pan or rotate.

Add an "Animated Gradient" background (also called a gradient animation or moving gradient) to [where].
The colors of the gradient should slowly pan across the area in a soft, continuous drift, with no visible jump when the loop restarts.
Keep text on top readable against every color, and stop the movement for users who prefer reduced motion.

A grid of lines or squares whose cells fade or flicker on and off.

Add an "Animated Grid Pattern" background (also called a flickering grid or grid background) to [where].
A faint grid of lines should stay in place while a few scattered cells slowly fade in and out at different times: quiet and subtle, never all at once.
Keep it behind the content without catching clicks, and stop the flicker for users who prefer reduced motion.