$fn=24;
include <sizes.scad>;

module arm() {
    color("yellow") cube([wall, arm_w, arm_h], true);
    translate([wall/2,-arm_w/2,arm_h/2]) {
        rotate([-90,0,0]) {
            difference() {
                color("khaki") cylinder(arm_w, d=wall, true);
                translate([-wall/2,-wall*2,0]) color("maroon") cube([wall, wall*2, arm_w]);
            }
//            halfpipe();
        }
    };
}

arm();