Just a play with hotspots to make an image 'interactive' in D3 and an excuse to reminisce.
Should have used a full size image, or one that at least had Zero in it. And I'm repeating what's on the pic already but hey …
Modified http://d3js.org/d3.v3.min.js to a secure url
https://d3js.org/d3.v3.min.js