$fs=.2;$fa=1;
r=.6;
r2=20;

step=1;

color("cadetblue")
for(i=[0:step:360-step])
  hull()for(i=[i,i+step]){
   translate([r2/2,0])rotate([45])rotate(i)translate([r2-r,0])sphere(r);
   translate([-r2/2,0])rotate([-45])rotate(i)translate([r2-r,0])sphere(r);
  }