thickness = 2;
width = 150;
height = 100;
depth = 45;

hole_distance = 5;
extrusion_depth = 5;
hole_radius = 1;

// Create grid of pins to cut holes later
module holeGrid(width, height, holeradius, holedistance){
    numx = round(width/holedistance) - 2;
    numy = round(height/holedistance) - 2;
    for(x = [0:numx]){
        for(y = [0:numy]){
            if(x == 0 || y == 0 || x == numx || y == numy){
                linear_extrude(extrusion_depth)
                    translate([x*holedistance, y*holedistance])
                        circle(holeradius, $fn=10);
            }
        }
    }
}

// Create hollow box
difference(){
    cube([width, depth, height]);
    translate([thickness, thickness, -thickness]){
        cube([width-2*thickness,depth-2*thickness, height+1]);
    }
    translate([hole_distance,hole_distance,-extrusion_depth/2+height]){
        holeGrid(width,depth,hole_radius,hole_distance);
    }
    rotate(90,[1,0,0]){
        translate([hole_distance,hole_distance,-extrusion_depth/2]){
            holeGrid(width,height,hole_radius,hole_distance);
        }
    }
    rotate(90,[1,0,0]){
        translate([hole_distance,hole_distance,-extrusion_depth/2-depth]){
            holeGrid(width,height,hole_radius,hole_distance);
        }
    }
    rotate(90,[0,0,1]){
        rotate(90,[1,0,0]){
            translate([hole_distance,hole_distance,-extrusion_depth/2]){
                holeGrid(depth,height,hole_radius,hole_distance);
            }
        }
    }
    rotate(90,[0,0,1]){
        rotate(90,[1,0,0]){
            translate([hole_distance,hole_distance,-extrusion_depth/2+width]){
                holeGrid(depth,height,hole_radius,hole_distance);
            }
        }
    }
}
// holeGrid(width,height,hole_radius,hole_distance);