Thanks a lot for those links, it explained a lot for me. I have a block of 4 animated tiles in layer 3. I also put the same block in layer 4 with trigger scenary on it and another block in layer 4 with no trigger scenary on it.

The block with no trigger scenary in layer 4 gets nr 1 (because its the same as the block in layer 3) but the block with a trigger scenary on it gets nr 2.

What I want now is that block 1 in layer 3 animates when I use a trigger zone. So how do I do this with the reworder?