mm = 2.834645;
lsd = activeDocument.activeLayer;
mySelection = activeDocument.selection;
coord=mySelection[0].geometricBounds;
grupp = lsd.groupItems.add();
line(lsd,((coord[0]/mm)-10),((coord[1]/mm)+15),((coord[0]/mm)-10),((coord[1]/mm)+5), 2);
line(lsd,((coord[0]/mm)-15),((coord[1]/mm)+10),((coord[0]/mm)-5),((coord[1]/mm)+10), 2);
grupp.duplicate();
grupp.position=Array((coord[2]/mm +5)*mm, ((coord[1]/mm)+15)*mm);
grupp.duplicate();
grupp.position=Array((coord[2]/mm +5)*mm, ((coord[3]/mm)-5)*mm);
grupp.duplicate();
grupp.position=Array((coord[0]/mm -15)*mm, ((coord[3]/mm)-5)*mm);
function line(parent,x1,y1,x2,y2, weight){
var line = parent.pathItems.add();
line.strokeOverprint = false;
line.fillOverprint = false;
line.stroked = true;
line.filled = false;
line.strokeWidth = weight;
line.setEntirePath( Array( Array(x1*mm, y1*mm), Array(x2*mm, y2*mm) ) );
line.move (grupp,ElementPlacement.PLACEATEND);
line = null;
}