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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; }
</style>
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<body>
<script>
// Feel free to change or delete any of the code you see in this editor!
var svg = d3.select("body").append("svg")
.attr("width", 300)
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.style("margin",200)
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svg.append("text")
.text("(x=50,y=50)")
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svg.append("circle")
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svg.append("circle")
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.attr("r", 3)
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</body>
https://d3js.org/d3.v4.min.js