% --- start of displayed preamble in the book ---
input metaobj
% --- end of displayed preamble in the book ---
defaultfont:="ptmr8r";
warningcheck:=0;
beginfig(1)
newDBox.a("") "dx(1cm)", "dy(1cm)";
a.c=origin;
drawObj(a);
endfig;
end;