Breathing halo border

An outline that fades all the way to transparent and back on a 4.6 s breath, with the outer halo rising and falling with it. At the bottom of the breath the panel has no edge at all — only light.

What it is

An outline that fades right down to nothing and comes back, with its glow rising and falling in step, roughly one breath every four and a half seconds. It marks a panel as live — a recording indicator, an active session, a call in progress, an assistant that is listening — without a spinner or a blinking dot. Quiet enough for a minimal interface, and the calmest of the five: nothing moves, only the light changes.

Full library — live sample, numbers, prompt and source — is for clients. I have the password

Seen in

Douyin @跟着学姐学AI · ep.34 “如何让 AI 生成五种粒子边框动效” · effect 02/05 · 0:07–0:09 (3× playback)