spiral.scad

%cylinder(2, r=8);

module spiral_part(angle, height, distance, radius) {
     rotate(angle, [0, 0, 1])
          translate([distance, 0, 0 ])
          rotate([90,0,0])cylinder(height, r = r, $fn=5);
}
module spiral(){
     height =1;
     union (){
          for (i = [3:0.1:8]){
               spiral_part(angle = i*360/7, height=height, distance = i + 6, r = i/2);
          }}
}
spiral();