module centerBeams()
{
	union(){
	rotate(90, [0, 1, 0])
	cylinder(h = 55, r1 = 5, r2 = 5, center = true);
	rotate(90, [1, 0, 0])
	cylinder(h = 55, r1 = 5, r2 = 5, center = true);
	rotate(90, [0, 0, 1])
	cylinder(h = 55, r1 = 5, r2 = 5, center = true);

	translate([ 0, 0, 25 ]) cylinder(h = 5, r1 = 7.5, r2 = 7.5, center = true);
	translate([ 0, 0, -25 ]) cylinder(h = 5, r1 = 7.5, r2 = 7.5, center = true);
	translate([ 0,25, 0]) rotate(90, [1, 0, 0]) cylinder(h = 5, r1 = 7.5, r2 = 7.5, center = true);
	translate([ 0, -25, 0]) rotate(90, [1, 0, 0]) cylinder(h = 5, r1 = 7.5, r2 = 7.5, center = true);
	translate([ 25, 0, 0 ]) rotate(90, [0, 1, 0]) cylinder(h = 5, r1 = 7.5, r2 = 7.5, center = true);
	translate([ -25, 0, 0 ]) rotate(90, [0,1, 0])  cylinder(h = 5, r1 = 7.5, r2 = 7.5, center = true);
	}

	translate([0,40,0]) rotate(90, [0, 0, 1])
	cylinder(h = 60, r1 = 5, r2 = 5, center = true);

}

module caps()
{
         difference() {
	translate([ 0, 0, 25 ]) cube([19.7, 19.7, 10], center = true);
	translate([ 0, 0, 25 ]) cylinder(h = 5.6, r = 7.8, center = true);
	translate([ 0, 0, 22.5 ]) cylinder(h = 5, r =5.6, center = true);
          sphere(r=22.3, center = true);
	}
}

module edges()
{
	union(){
		difference(){
			sphere(r=22, center = true);
			translate([-17.2, 0, 0]) cube([45,45,45], center = true);	
			translate([0, -17.2, 0]) cube([45,45,45], center = true);
			translate([0, 0, 14.9]) cube([45,45,20], center = true);
			translate([0, 0, -14.9]) cube([45,45,20], center = true);
			}
		difference(){
		translate([ 20,20, 0 ]) cube([19.7,19.7,19.7], center = true);
		sphere(r=22.4, center = true);
		}
		translate([10.15, 10.15, -5]) cube([9.7, 9.7, 10]);
	}

}

module corners()
{
	union(){
		difference(){
			sphere(r=22, center = true);
			translate([-17.2, 0, 0]) cube([45,45,45], center = true);	
			translate([0, -17.2, 0]) cube([45,45,45], center = true);
			translate([0, 0, -17.2]) cube([45,45,45], center = true);
			}
		translate([ 20, 20, 20 ]) cube([19.7,19.7,19.7], center = true);
	}

}


module letterG()
{
	rotate([90,0,0]){
		union(){
		translate([2.1, 2.1, 20]) cylinder(r=1.25, h=21, center = true, $fn = 15);
		translate([-2.1, 2.1, 20]) cylinder(r=1.25, h=21, center = true, $fn = 15);
		translate([-2.1, -2.1, 20]) cylinder(r=1.25, h=21, center = true, $fn = 15);
		translate([0, 1.05, 20]) cube([6.7,2.1,21], center = true);
		translate([0, 2.1, 20]) cube([4.2,2.5,21], center = true);
		translate([-1.05, 0, 20]) cube([2.1,6.7,21], center = true);
		translate([-2.1, 0, 20]) cube([2.5,4.2,21], center = true);
		translate([5, 0.325, 20 ]) cube([11, 0.75 ,21], center = true);
		}	
		
		difference(){
		translate([8.7, 8.7, 20]) cube([2.5,2.5,21], center = true);
		translate([7.35, 7.35, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);	
		}
		
		difference(){
		translate([-8.7, 8.7, 20]) cube([2.5,2.5,21], center = true);
		translate([-7.35, 7.35, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);	
		}

		difference(){
		translate([-8.7,-8.7, 20]) cube([2.5,2.5,21], center = true);
		translate([-7.35,-7.35, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);		
		}
         }
}

module letterE()
{
	translate([5,4,-20])  cube([10.5,3.4,21], center=true);
	translate([5,-4,-20])  cube([10.5,3.4,21], center=true);	
}


module letterB()
{
	rotate([0,90,0]){
		difference(){
		translate([-8.7, -8.7, 20]) cube([2.5,2.5,21], center = true);
		translate([-7.35, -7.35, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);	
		}
		
		difference(){
		translate([-8.7, 8.7, 20]) cube([2.5,2.5,21], center = true);
		translate([-7.35, 7.35, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);	
		}
		
		difference(){
		translate([-8.7, 0 , 20]) cube([2.5,5,21], center = true);
		translate([-7.35, -2.5, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);	
		translate([-7.35, 2.5, 20]) cylinder(r=2.5, h=21, center = true, $fn = 15);	
		}

		translate([-2.5,4,20])   cylinder(r=1.67,h=21, center=true, $fn=15);
		translate([-2.5,-4,20])  cylinder(r=1.67, h = 21, center=true, $fn = 15);	
		translate([0,4,20])   cube([5,3.4,21], center = true);
		translate([0,-4,20])  cube([5,3.4,21], center = true);	
	}	
}

centerBeams();

// Center caps

difference(){
rotate(180, [0, 1, 0]) caps();
letterE();
}

difference(){
rotate(90, [0, 0, 1]) caps();     
translate([0,0,40]) letterE();
}

difference(){
rotate(90, [1, 0, 0]) caps();  
letterG();
}

difference(){
rotate(90, [-1, 0, 0]) caps(); 
translate([0,40,0]) letterG();
}

difference(){
rotate(90, [0, 1, 0]) caps();   
letterB();
}

difference(){
rotate(90, [0, -1, 0]) caps(); 
translate([-40,0,0])letterB();
}

// Corners

difference(){
rotate(90, [0, 0, 1]) rotate(90, [1, 0, 0]) corners();   
translate([20, 40, 20]) letterG();
translate([20, 20, 40]) letterE();
translate([0, 20, 20]) letterB();
} 

difference(){
rotate(180, [0, 0, 1]) rotate(90, [1, 0, 0]) corners();
translate([-20, 40, 20]) letterG();
translate([-20, 20, 40]) letterE();
translate([-40, 20, 20]) letterB();
} 

difference(){
rotate(270, [0, 0, 1]) rotate(90, [1, 0, 0]) corners();
translate([-20, 0, 20]) letterG();
translate([-20, -20, 40]) letterE();
translate([-40, -20, 20]) letterB();
} 

difference(){
rotate(360, [0, 0, 1]) rotate(90, [1, 0, 0]) corners();
translate([20, 0, 20]) letterG();
translate([20, -20, 40]) letterE();
translate([0, -20, 20]) letterB();
} 

difference(){
rotate(90, [0, 0, 1]) rotate(90, [0, 1, 0]) corners();
translate([-20, 40, -20]) letterG();
translate([-20, 20, 0]) letterE();
translate([-40, 20, -20]) letterB();
} 

difference(){
rotate(180, [0, 0, 1]) rotate(90, [0, 1, 0]) corners();
translate([-20, 0, -20]) letterG();
translate([-20, -20, 0]) letterE();
translate([-40, -20, -20]) letterB();
}

difference(){
rotate(270, [0, 0, 1]) rotate(90, [0, 1, 0]) corners();
translate([20, 0, -20]) letterG();
translate([20, -20, 0]) letterE();
translate([0, -20, -20]) letterB();
}

difference(){
rotate(360, [0, 0, 1]) rotate(90, [0, 1, 0]) corners();
translate([20, 40, -20]) letterG();
translate([20, 20, 0]) letterE();
translate([0, 20, -20]) letterB();
}

// Edges

difference(){
rotate(90, [0, 0, 1]) rotate(90, [1, 0, 0]) edges();
translate([0, 40, 20]) letterG();
translate([0, 20, 40]) letterE();
translate([-20, 20, 20]) letterB();
}

difference(){
rotate(180, [0, 0, 1]) rotate(90, [1, 0, 0]) edges();
translate([-20, 20, 20]) letterG();
translate([-20, 0, 40]) letterE();
translate([-40, 0, 20]) letterB();
}


difference(){
rotate(270, [0, 0, 1]) rotate(90, [1, 0, 0]) edges();
translate([0, 0, 20]) letterG();
translate([0, -20, 40]) letterE();
translate([-20, -20, 20]) letterB();
}

difference(){
rotate(360, [0, 0, 1]) rotate(90, [1, 0, 0]) edges();
translate([20, 20, 20]) letterG();
translate([20, 0, 40]) letterE();
translate([0, 0, 20]) letterB();
}

difference(){
rotate(90, [0, 0, 1]) rotate(90, [0, 1, 0]) edges();
translate([-20, 20, -20]) letterG();
translate([-20, 0, 0]) letterE();
translate([-40, 0, -20]) letterB();
}

difference(){
rotate(180, [0, 0, 1]) rotate(90, [0, 1, 0]) edges();
translate([0, 0, -20]) letterG();
translate([0,-20, 0]) letterE();
translate([-20, -20, -20]) letterB();
}

difference(){
rotate(270, [0, 0, 1]) rotate(90, [0, 1, 0]) edges();
translate([20, 20, -20]) letterG();
translate([20, 0, 0]) letterE();
translate([0, 0, -20]) letterB();
}

difference(){
rotate(360, [0, 0, 1]) rotate(90, [0, 1, 0]) edges();
translate([0, 40, -20]) letterG();
translate([0,20, 0]) letterE();
translate([-20, 20, -20]) letterB();
}

difference(){
rotate(90, [0, 0, 1]) edges();
translate([-20, 40, 0]) letterG();
translate([-20, 20, 20]) letterE();
translate([-40, 20, 0]) letterB();
}

difference(){
rotate(180, [0, 0, 1]) edges();
translate([-20, 0, 0]) letterG();
translate([-20,-20, 20]) letterE();
translate([-40, -20, 0]) letterB();
}

difference(){
rotate(270, [0, 0, 1]) edges();
translate([20, 0, 0]) letterG();
translate([20,-20, 20]) letterE();
translate([0, -20, 0]) letterB();
}

difference(){
rotate(360, [0, 0, 1]) edges();
translate([20, 40, 0]) letterG();
translate([20,20, 20]) letterE();
translate([0, 20, 0]) letterB();
}