An analog clock, using the D3 radial axis to render the frame.
https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.23.1/babel.min.js
https://cdnjs.cloudflare.com/ajax/libs/d3/4.6.0/d3.min.js
https://unpkg.com/d3-radial-axis@1.5/dist/d3-radial-axis.min.js