[Ryan Hill]

change to mod 3 instead of mod 2, and add a greater than

First layer:
(time%3>1)*100

Second layer:
(time%3>0)*100

Also, if you want to reduce the frequency of the change, you can do something like this:
((time/2)%2>1)*100
to divide the frequency in half.

[Ryan Hill]

Or, better,
(time%2)*100

[Ryan Hill]

Or, better,
(time%2)*100

[Ryan Hill]

I would apply an expression to the opacity property of the top video. Something like:
time%2

[Ryan Hill]

I would apply an expression to the opacity property of the top video. Something like:
time%2

[Ryan Hill]

I could also do the motion at a constant speed, pre-compose it, and then apply an expression to the time remapping, but that will go backwards, too, if I just apply a wiggle.

[Ryan Hill]

That was the only thing I could think of that would be tied into the layer map.

Change one parameter at a time until you see it happen again.

The particles appear to change direction twice. How were you doing that? The first direction change seems to line up both versions, but the second is different.

[Ryan Hill]

On your layer map, is the anchor point right in the middle of your glowy sparkle? It should be.

[Ryan Hill]

Does this thread cover it?

https://forums.creativecow.net/cgi-bin/new_read_post.cgi?univpostid=867773&forumid=2&postid=867773&pview=t

[Ryan Hill]

I maybe had that backwards. Start with the largest image, zoom in on where you want the enclosed image, place it, parent it, repeat. That way, you can line up the two images a lot better.