moduletower(coord){translate(coord){rotate([0,0,(360/8)/2]){cylinder(11,2.5,2.5,$fn=8);translate([0,0,10])cylinder(2,3,3,$fn=8);}}}// towers bluedifference(){tower([0,0,0]);//walls are redtranslate([0,-1,-1])cube([20,2,8.5]);translate([-1,0,-1])cube([2,20,8.5]);}