% --- start of displayed preamble in the book --- input metaobj; show_empty_boxes:=true; % --- end of displayed preamble in the book --- defaultfont:="ptmr8r"; warningcheck:=0; beginfig(1) show_empty_boxes:=true; newHRazor.a(3cm) "framed(true)"; a.c=origin; drawObj(a); endfig; end;