r=165;
s=50;

module elem(){
	cube([20,20,20], true);
}

jmax=2;
difference(){
union(){
	rotate([0,0,360*$t]){
	for(j=[0:2:jmax-1]){
	for(i=[0+j:jmax:110])
	translate([s*cos(i*r)*sin(i),s*sin(i*r)*sin(i),s*cos(i)])
	support()
	scale(0.3+i/80)
	rotate([0,i*-8,i*r])
	elem();

	for(i=[1+j:jmax:110])
	translate([s*cos(i*r)*sin(i),s*sin(i*r)*sin(i),s*cos(i)])
	support()
	scale(0.3+i/80)
	rotate([0,i*8,i*r])
	elem();
	}

	sphere(s);
	}
}
translate([0,0,-25]) cube([150,150,50], true);
}

//This shape describes a good subtraction object that you can
//use to save on plastic.
/*!union(){
	hull(){
		scale([1,1,0.8])sphere(47);
		translate([0,0,35]) sphere(16);
	}
}*/
//Inverse for other operations.
/*!difference(){*/
	/*sphere(2*s);*/

	/*translate([0,0,-110]) cube([200,200,200], true);*/
	/*union(){*/
		/*hull(){*/
			/*scale([1,1,0.8])sphere(47);*/
			/*translate([0,0,35]) sphere(16);*/
		/*}*/
	/*}*/
/*}*/

//Anti overhang
module support(){
	hull(){
		children();
		translate([0,0,-20]) scale(0.2) children();
	}
}