union(){
     intersection(){color ("white")cube(size=[8,8,8], center=true); color ("pink")sphere(r=4.50);}
}
difference()  {
    color("lightcyan")cube(size=[7,6,7], center=true); sphere(r=3.75);}
translate([0,0,6]) {
union() {
 	color ("pink")cylinder (h = 5, r=0.7, center = true, $fn=100);
 	rotate ([120,10,0])color("white")cylinder (h = 5, r=0.7, center = true, $fn=100);rotate ([60,10,0])color("white")cylinder (h = 5, r=0.7, center = true, $fn=100);
}
 };
translate([0,0,6]) {
color ("lightcyan")sphere(r=1.60);
}