Hello Jordan,
I have looked at that, and it does not have the iteractivity between multiple buttons. In the second example when you click the first button it becomes highlighted as selected (something I cannot seem to get the new filter buttons to do). But more importantly, when you click a different button, not only does the filter change but the state of the first button becomes unselected, in otherwords they are responsive to each other. Additionally, I am hoping the code will help me learn to make a button two-state, so that when I click on it once it is selected, when I click on it again, it is not selected. two actions for click dependent on current state. I hope this makes sense.