[Inkscape-user] Inkscape presentation flashing object effect (Jessyink / Sozi ...)

Dear list,

I am looking to create a presentation using an(y) inkscape plugin, so far I have tried Jessyink and just found Sozi. What I am looking for in particular is to be able to create a /flashing/ effect on appearance, so that when the object first appears, it should flash X times in Y seconds after which it just stays. This is to draw attention to the newly appeared object on a large image.

How does one create such a flashing effect on appearance, can this be done with any of the plugins mentioned or others, or maybe it can be directly done in inkscape?

Thanks!