wow that's impressive! i'll give that a try
but that's with two items in the item frame. But what if there were four item frames next to each other and by every click it changes to any of the four items in order (like for example: water bottle, fire charge, ender pearl and creeper head)? and when it's in the correct order (first frame: fire charge, second frame: creeper head, third frame: water bottle and fourth frame: ender pearl) it triggers a redstone output
is that possible or no?