module customcylinder() {
    intersection() {
        cube([8,8,2], true);
        rotate([0,0,10]) {
            cube([8,8,2], true);
        }
        rotate([0,0,20]) {
            cube([8,8,2], true);
        }
        rotate([0,0,30]) {
            cube([8,8,2], true);
        }
        rotate([0,0,40]) {
            cube([8,8,2], true);
        }
        rotate([0,0,50]) {
            cube([8,8,2], true);
        }
        rotate([0,0,60]) {
            cube([8,8,2], true);
        }
        rotate([0,0,70]) {
            cube([8,8,2], true);
        }
        rotate([0,0,80]) {
            cube([8,8,2], true);
        }
    }

}

module wheel() {
    rotate([0,90,0]) {
        union() {
            difference() {
                customcylinder();
                resize([6,6,2]) {
                    customcylinder();
                }
            }
            cube([7,0.5,1], true);
            rotate([0,0,45]) {
                cube([7,0.5,1], true);
            }
            cube([0.5,7,1], true);
            rotate([0,0,45]) {
                cube([0.5,7,1], true);
            }
        }
    }
}

wheel();