$fn = 64;
h = 15;
w = 7;

module notchesSphere (HowMany){
        for(i = [0:HowMany]){
            rotate(i*360/HowMany)
            translate([15,-4,0])
            square([h, w]);
        }
    }

module sphere(){
    difference(){
        circle(30);
        notchesSphere(4);
        circle(5);
    }
}

module rectangle(){
    module notchesRectangle(HowMany){
    for(i=[0:HowMany]){
        rotate ([i*360/HowMany])
        translate([46.5,10,0])
        square([w, h]);
        }
    }

    difference(){
        translate([40,-25,0])
        square([20, 50]);
        notchesRectangle(2);
    }
}

module L(){
    translate([150,0,0])
    difference(){
        circle(15);
        circle(5);
    }
    
    difference(){
        translate([140,10,0])
        square([20, 40]);
        
        translate([146.5,35.5,0])
        square([w, h]);
        
    }
    
    difference(){
        translate([100,-10,0])
        square([40, 20]);
        
        translate([100,-3.5,0])
        square([h, w]);
    }   
}

module hexagon(){
    difference(){
        circle(30,$fn=8);
        rotate([0, 0, 24.5])

        notchesSphere(4);
    }
}

translate([170, 0, 0])
hexagon();


translate([-30,0,0])
L();
sphere();
rectangle();