Did you try the ProgressBar Control. Sorry if I'm coming across as Mr Obvious here. You shouldn't be expecting users of the forum to write your code for you. But if the properties of the progress bar that are exposed by Xamarin Forms aren't sufficient to accomplish your needs then check out Effects or Custom Renderers.
I'll be happy to try and answer your questions if you have something specific about the ProgressBar that you have questions about how to accomplish.
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