Resetting variables on each slide

Hi, community! I am giving this weeks challenge a crack and have hit a snag.

I have 5 slides with a spot the difference on each slide. The user has 10 attempts to find the difference. I have set up a variable to count the clicks.

Where I am struggling is, how do I reset the click/attempt variable so that that clicks don't carry over on to the following slide. At the moment if you take say 6 clicks on slide one, you are getting the incorrect layer on slide 2 after 4 clicks.

Thank you in advance!

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