html`<svg width=400 height=400>
<defs>
<linearGradient id="g1" x1="0%" y1="0%" x2="0%" y2="100%">
<stop offset="0%" stop-color="red"/>
<stop offset="100%" stop-color="blue"/>
</linearGradient>
<linearGradient id="g2">
<stop offset="0%" stop-color="lightgreen"/>
<stop offset="100%" stop-color="crimson"/>
</linearGradient>
<linearGradient id="g3" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" stop-color="green"/>
<stop offset="100%" stop-color="white"/>
</linearGradient>
</defs>
<g class="isolate">
<circle cx="100" cy="100" r="100" fill="url(#g1)" fill-opacity="1"/>
<circle cx="100" cy="100" r="100" fill="url(#g2)" fill-opacity="1"/>
<circle cx="100" cy="100" r="100" fill="url(#g3)" fill-opacity="1"/>
</g>
</svg>`