<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />

    <title>Horizontal Playground</title>

    <script src="../blockly_uncompressed_horizontal.js"></script>
    <script src="../msg/messages.js"></script>
    <script src="../blocks_common/math.js"></script>
    <script src="../blocks_common/text.js"></script>
    <script src="../blocks_horizontal/control.js"></script>
    <script src="