h1=30;  // hauteur boite
h2=20;  // hauteur couvercle
r1=150;  //rayon boite
r2=151;   //rayon couvercle

module boite(){
cylinder(h=h1, r=r1);
translate([0, 0, 30])
	cylinder(h=h2, r=r2);
};

difference()
{
	union()
	{
for(a=[	[0, 0, 0],
			[5, 10, h1+h2],
			[10, -5, 2*(h1+h2)],
			[15, 5, 3*(h1+h2)],
			[20, 10, 4*(h1+h2)],
			[25, 0, 5*(h1+h2)]	])
		{translate(a)boite();}	
	}
cylinder (r=100, h=6*(h1+h2));
}