Return to document without reloading HTML

[joezeffdesign (Joe Zeff)]

Thanks so much, Jonathan! Got it to work!

Now, onto the next puzzle ...

Buttons that know that they've been clicked

Trying to do something that I think is possible, but I'm looking for help to create the Javascript. There are eight cards on a page. Each card is a group of stacked PNG files, some of which are not yet visible (0% opacity). The Main Timeline ends with a "black 1" PNG visible in each group. [Screen Shot 2020-08-19 at 8.19.46 PM] Each card has its own timeline. Clicking on any card continues that timeline, showing the "red 2" PNG that is on top of what's already visible, then pausing. [Scree…