beginfig(1);
u =         0.1000000000 cm;
draw 
     (        0.0000000000u,        0.0000000000u)--
     (      100.0000000000u,        0.0000000000u)--
     (      100.0000000000u,      100.0000000000u)--
     (        0.0000000000u,      100.0000000000u)--cycle;
draw fullcircle
     xscaled         44.0000000000u
     yscaled         44.0000000000u
     shifted (       22.0000000000u,       78.0000000000u);
draw fullcircle
     xscaled         44.0000000000u
     yscaled         44.0000000000u
     shifted (       78.0000000000u,       66.2780999201u);
draw fullcircle
     xscaled         44.0000000000u
     yscaled         44.0000000000u
     shifted (       78.0000000000u,       22.0000000000u);
draw fullcircle
     xscaled         44.0000000000u
     yscaled         44.0000000000u
     shifted (       22.0000000000u,       22.0000000000u);
endfig;
end;