I've made a start using isosurfaces. Here's the relevant portion...

#declare POSX = sin(clock*(pi*2))*5;
#declare POSZ = cos(clock*(pi*2))*5;

#declare Well1=function{sqr(-y)*(x^2+z^2)-5 }
#declare Well2=function{sqr(-y)*((x+POSX)^2+(z+POSZ)^2)-0.5 }

  isosurface{
      function { -y&Well1&Well2 }

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