Echo

What moves below leaves fading trails.

Setting	Kind	Starts at	Range and notes
Trail length`decay`	number	85%	0% to 98%
Zoom`zoom`	number	15%	-100% to 100%Below zero, trails shrink inwards
Turn`turn`	number	0°/s	-90 to 90°/s
Drift`offset`	two numbers	[0, 0]	-1 to 1
Colour shift`hueShift`	number	10%	0% to 100%
Blend`mix`	choice	Brightest	Over, Light, Brightest

From a script

Every setting above can be changed by the scene's logic, by its key. Say the layer is called Echo:

scene.set("Echo", "decay", 0.98);scene.animate("Echo", "opacity", 0.5, 2);

import { scene } from "motion";scene.set("Echo", "decay", 0.98);scene.animate("Echo", "opacity", 0.5, 2);

What every layer has

Besides its own settings, every layer has its opacity, blend, placement, quick effects and an effects stack. They're listed once, on the layers page.