Flashing circle that needs to have other states

I have a new challenge in Articulate Storyline.

I've been given this menu with a flashing white circle telling the student which section is next.

The customer would like to have the same in Storyline. 

I think that, as the circle must have different states (normal, hover, visited) is not possible to have this flashing effect, but I'm not sure about it.

I'll appreciate to know if it isn't really possible, so I search for other workarounds.

Thank you very much!!

Belen

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