My 20-year-old Java Program Is Was Broken!

So a harmless little Java program I wrote in 1997 no longer works, due to security updates in modern browsers. It’s a simulation of medieval pageant wagons in the town of York, England. I wish I’d recorded a screencast of myself demonstrating it while it worked. I imagine it will be possible to get it working somehow, but it will no longer simply work as an app embedded in a web page. What I really need to do is rewrite it, probably in HTML5. That’s been on my to-do list for way too long. York Pageant Simulator Applet.