Damned you have found a tutorial that i have not translated! :)
(will be made tomorrow)
https://moiscript.weebly.com/batteur-doeufs.html

Else for your problem

I have not seen the tuto but you can make something like this

- Create the curvated surface (Revolve a Profil)
- Copy Move it above
- "Flat" it with the Edit Frame
- Draw the little objects anywhere you want on this Flat surface
And use the Flow function
(Select Objects, Click the Flat Surface, Click the curvated Surface --- Rigid (else little objects will be deformed)
& Voilà ! :)
(here just the Flow) here the file 3DM if you want see before after https://moiscript.weebly.com/uploads/3/9/3/8/3938813/heads.3dm