gistfile1.txt

module tube(height, radius, wall, center = false) {
  difference() {
    cylinder(h=height, r=radius, center=center);
    translate([0,0,-1]) cylinder(h=height + 2, r=radius-    wall, center=center);
  }
}

for(k=[0: 20.5: 300]) {
    P = k / 300.0;
    rotate([k*3.0,0,0])
    translate([0, 3.3 - 3.3 * P,0])
    scale(1.0 - 0.4 * P)
//    translate([0,0,0.1 * k])
//    cylinder(0.1, $fn=50);
    tube(0.3, 1.0, 0.1, $fn=30);
//    sphere(1, $fn=40);
}

sphere(0.6, $fn=40);