image icon on pages rather than the default page icon

I think I'm already finished with my elgg project. Only one thing is left and I really hope someone could provide me with some assistance. I need a plugin that checks if the page the user made (in a group) has a picture (or youtube vid) and if it has, make that picture its icon,  instead of the default paper icon. 

Only do this on the very top parent page, child pages and its further child pages does not need to have its default icon change. tnx.

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