D3 Examples - Master and Slave Levers

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<!DOCTYPE html>
<head>
    <meta charset="utf-8" />
    <title>Levers</title>
    <link rel="stylesheet" type="text/css" href="levers.css">
    <style type="text/css">
    </style>
    <script src="https://d3js.org/d3.v3.min.js"></script>
</head>
<html>
    <body>
        <div class="legend" id="speed_box">
            <p>
            Click on the background to activate
            </p>
            Duration:   <input
            class="legend" type="text" id="ms" value="3.0"
            style="width:2.5em; height:1em;
                border:solid magenta 1px;padding-left:0.5em" />
            seconds.
        </div>
        <script src="levers.js"></script>
    </body>
</html>
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