//Création de l'objet
difference(){
color("white")sphere(r=20, $fn=100);
   color("white") sphere(r=15.7,$fn=100);
   color("white")  cylinder(h=70,r=10.7, center=true, $fn=100);
    color("white") rotate ([90,0,0]) cylinder(h=0,r=0, center=true, $fn=100);
   color("white")  rotate ([0,90,0]) cylinder(h=70,r=10.7, center=true, $fn=100);
 
    }
// Ajout d'une sphère 
    color("pink") sphere(r=13.9,$fn=100);