// example4.escad -- the twisted extruded product of the union of five circles.
linear_extrude (height = 40, center=true, twist=90){
        union ( r = 8) {
                circle (10);
                translate ([22,0]) circle (10);
                translate ([0,22]) circle (10);
                translate ([-22,0]) circle (10);
                translate ([0,-22]) circle (10);
        }
}