beginfig(1); u = 0.5000000000 cm; draw (0,0)--(0, 5.3277596117u)--( 5.3277596117u, 5.3277596117u)--( 5.3277596117u,0)--cycle; draw fullcircle xscaled 2.0000000000u yscaled 2.0000000000u shifted ( 2.1092532039u, 4.3277596117u); draw fullcircle xscaled 2.0000000000u yscaled 2.0000000000u shifted ( 2.1092532039u, 1.0000000000u); draw fullcircle xscaled 2.0000000000u yscaled 2.0000000000u shifted ( 4.3277596117u, 4.3277596117u); draw fullcircle xscaled 2.0000000000u yscaled 2.0000000000u shifted ( 1.0000000000u, 2.6638798059u); draw fullcircle xscaled 2.0000000000u yscaled 2.0000000000u shifted ( 3.2185064078u, 2.6638798059u); draw fullcircle xscaled 2.0000000000u yscaled 2.0000000000u shifted ( 4.3277596117u, 1.0000000000u); endfig; end;