it isn’t practical to have an example form for EVERY possible thing that can be done I’m afraid.
but set up a simple test form and break the requiremnents down into seperate stages so you can see how they work individually.
ie that you can set up a script that can ‘count’ up into another field from the ‘is clicked’ event.
When you have that, then look at second element where you can validate the content of this field in a conditional script. That is demonstrated in this interactive form (although not specifically on a ‘value’) http://www.perfectforms.com/Documentation/manual/html/fl_required_field_checking_and_fi.htm