Enlarge and antialias the picture, and time the computation (also make
the background gray instead of blue).
Separate computing the answer into a function of its own with
controllable grid size.

The goal is to later be able to do progressive improvement of the
resolution of the image.
Abstract the scale at which the picture is drawn (that is, a
high-resolution canvas can still hold a low-resolution image).
Much enhance the demo: stage improving resolutions and report flops/ms.
Materials for the talk at the Boston Scheme and Lisp User Group.
Ignore junk.
Better extension.
Skeleton of talk materials.
A little style and customization for the meeting.
Better names and less junk in the asm.js output.
Now this code is presentable.
Capture my notes about what to say.
Prepare the dvl code (and note things to say about the demo).
Thorough edit.
Oops, forgot to check in the rest of the major edit.