beginfig(1);
u =         0.1250000000 cm;
draw 
     (        0.0000000000u,        0.0000000000u)--
     (       80.0000000000u,        0.0000000000u)--
     (       80.0000000000u,       80.0000000000u)--
     (        0.0000000000u,       80.0000000000u)--cycle;
draw fullcircle
     xscaled         34.0000000000u
     yscaled         34.0000000000u
     shifted (       17.0000000000u,       63.0000000000u);
draw fullcircle
     xscaled         34.0000000000u
     yscaled         34.0000000000u
     shifted (       63.0000000000u,       63.0000000000u);
draw fullcircle
     xscaled         34.0000000000u
     yscaled         34.0000000000u
     shifted (       63.0000000000u,       17.0000000000u);
draw fullcircle
     xscaled         34.0000000000u
     yscaled         34.0000000000u
     shifted (       17.0000000000u,       23.4735000619u);
endfig;
end;