html`<svg width=${width} height=${height}>
<path d="M${pointOnCircle(Math.PI * 1.5, r).x},${pointOnCircle(Math.PI * 1.5, r).y} A ${r},${r} 1 1 0 ${pointOnCircle(1.75 * Math.PI, r).x},${pointOnCircle(1.75 * Math.PI, r).y}" style="stroke: black; fill: none;"></path>
<circle cx=${x1} cy=${y1} r=5></circle>
<circle cx=${cx} cy=${cy} r=5></circle>
</svg>`