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<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body {
margin: 0;
position: fixed;
top: 0;
right: 0;
bottom: 0;
left: 0;
}
circle, path {
fill: pink;
stroke: gray;
}
</style>
</head>
<body>
<svg width=960 height=500>
<circle cx=205 cy=200 r=45 />
<circle cx=395 cy=200 r=45 />
<path d="M150,300 Q300,450 450,300 L150,300 Z" />
</svg>
</body>
https://d3js.org/d3.v4.min.js