Wave Fading Effect

Hi everyone,
found this super cool definition, is it possible to make the waves fade towards the edges of the surface?

waves-from-2-point.gh (30.5 KB)

Linear instead of circular? Yes, you can do that - or just make the radius very large. This thread (and others) get into it:

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I meant, I would like the wave to fade from the point where it is generated towards the outer edges, leaving them straight