The Poser animation in these is pretty simple - a rotating figure is just about the simplest animation you can make. Take 30 frames, and divide 360 (degrees in a full circle) by 30 to get 12 degrees per frame. So frame 2 is rotated 12 degrees on the Y axis beyond frame 1. Frame 3 is 24 degrees further than frame 1, etc. When you're done, frame 30 and frame 1 should be identical, so you can just throw out frame 30 and have a seamlessly looping 29 frame animation.

As for the synchronized effect in Opera, when the animation begins to play back depends on how quickly the browser can load the image and begin to display it, and how faithfully it honors the timing embedded in the animated GIF. I have heard Opera's page renderer is extremely fast, and this would seem to bear that out. Both GIFs are loading so quickly that it's close to simultaneous, or maybe the page doesn't display (and the animation doesn't begin) until after all the files have been retrieved. Either way, what you get is they both appear and start playing at the same time, and are therefore in sync.

Other (slower) browsers load and render one GIF first and then the other, start playing them at different times, and so the synchronization is lost. Also, in my experience IE often ignores the timing info in the GIF that's supposed to control the speed of the animation, so that might be an issue too.

• Jimdoria  ~@>@