cat-door-bar.scad

union(){
  translate([0, 0, 2])
  union() {
    translate([2,0,0]) cube([220,20,2]);
    translate([222,0,0]) cube([2,20,18]);
    cube([2,20,18]);

    translate([0,0,16])
      linear_extrude(
        height = 2,
        center = false,
        scale = [2, 1]
      )
      square([2,20]);

    translate([224,0,16])
      mirror([1,0,0])
      linear_extrude(
        height = 2,
        center = false,
        scale = [2, 1]
      )
      square([2,20]);
  }
  
  translate([0, 10, 0])
  union(){
    linear_extrude(
      height = 2,
      center = false,
      scale = [1, 2.5]
    )
    square([224,4]);
    
    mirror([0,1,0])
    linear_extrude(
      height = 2,
      center = false,
      scale = [1, 2.4]
    )
    square([224,4]);
  }
}