How to pause a running program?

Hello friends! I am a beginner and facing a serious problem in my application. Suppose I have large no of reviews in my online shopping application and want to pause the reviews after each 10 objects i.e basically want to give the viewer a "see more" facility, have been trying to pause the application after a certein interval of objects but still didnt manage to find the work through. If possible please help me to resolve this problem ...
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