$fn = 200;

difference(){
    cube([40,30,14]);
    translate([2,2,2]){
        cube([36,26,13]);
    }
    translate([0,7.5,3.5]){
        cube([4,15,6]);
    }
}

difference(){
    translate([0, 40, 0]){
        cube([40,30,1]);
        translate([2,2,1]){
            cube([36,26,1]);
        }
    }
    translate([32,47,0]){
        //cube([5,5,2]);
        cylinder(h=2,r=3);
    }
    translate([25+2.5,60,0]){
            cube([7,5,2]);
            //cylinder(h=2,r=2.5);
    }
}