LFO trigger to midi map

I have a query, can someone help me?
I need to recreate an image, at the moment I trigger a note a circle appears that increases in size (simulating the waves of a drop when it falls into the water) I can’t find any LFO map that is activated with a trigger, I had thought of using eTrack transform and map scale through a trigger, but scale is always active, any solution?

Greetings to all

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