a ring chart (or a donut chart if you are hungry) that animates into existence.
this answer http://stackoverflow.com/questions/20501067/animating-d3-donut-chart-on-load had just the tween and transition code examples needed to animate each slice in sequence.
Original README.md:
This is the code for Chapter 5, Figure 6 from D3.js in Action demonstrating how to make a donut chart using d3.layout.pie().
forked from emeeks‘s block: Ch. 5, Fig. 6 - D3.js in Action
forked from emeeks‘s block: Pie Transition Ch. 5 - D3.js in Action