Why we can't have 87 states

On flag day you may have heard about mathematician Skip Garibaldi's computer program designed to figure out how our flag would look as we add more states. Garibaldi's program used the typical patterns we've used over the centuries... and allows you to click through all the possibilities. What's weird is that any state number would work just fine... EXCEPT 87 and 69. Those two numbers just can't be configured to work using traditional patterns. I guess we should name them the "Garibaldi Numbers"... for the guy who discovered this kryptonite of the American flag. Check out the interactive map for yourself. It's fun!