module zero(){
    difference(){
        square([80,100]);
        translate([20,20,0])
        square([40,60]);
    }
    rotate([0,0,-30])
    translate([0, 10, 0])
    square([20, 90]);
}

module one(){
    translate([160,0,0])
    square([40, 100]);
    translate([140,0,0])
    square([80, 30]);
    translate([140,70,0])
    square([20, 30]);
}

zero();
one();