% --- start of displayed preamble in the book ---
input metafun
% --- end of displayed preamble in the book ---
defaultfont:="ptmr8r";
warningcheck:=0;
beginfig(1)
draw unitsquare scaled 1.5cm
                randomized (1mm,2mm);
draw unitsquare scaled 1.5cm
                squeezed (1mm,5mm)
                shifted (3cm,0);
endfig;
end;