Grasshopper Pattern Help

[laurent_delrieu]

Hello
You will find the same pattern here

Describe this force field type pattern please

Im sure I’ve e seen a GH def for a pattern like this but i cant find it anywhere on either forum now. Similar to the wave interference patterns but it lioks more like a force field / height field than the water drop interference patterns. Can anyone locate a link or suggest any info to help me create a definition. https://pin.it/oowo5iphe7xuic