Did a large portion of the trace game demo:

1. Kept the D3 bubbles (will be grey outside of "e" and colored inside)
2. Changed styles (stroke thickness, background color, etc)
3. Placed a canvas on top to draw a line when the cursor is in the "e". This line is made of circles to
   create thicker line. TODO: interpolate to remove spaces between mousemove updates
4. Border becomes red when mouse leaves the letter