You must create a wordpress plugin that creates a shortcodes generator to display an image and when you move the mouse over the image it brings up a new image as a gif or jpg.
Showing shortcodes like this plugin: [url removed, login to view]
So small icon in the wordpress editor which opens an interface where the two images are downloaded and given the action that it must be.
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Hello We have read your requirements We are much interested to start this project. A gentle request please check our portfolio link below before taking any decision :- pkweb.in Thanks Steve