Template for creating bl.ocks.
xxxxxxxxxx <head> <meta charset="utf-8"> <link type="text/css" rel="stylesheet" href="style.css"/> </head> <body> <script src="https://cdn.jsdelivr.net/npm/d3@2.7.2/d3.js"></script> <script src="src.js"></script> <script src="test.js"></script> <script src="lib.js"></script> </body></html> Modified http://mbostock.github.com/d3/d3.js?2.7.2 to a secure url
https://mbostock.github.com/d3/d3.js?2.7.2