Question 360974
{{{drawing(300,300,-5,5,-5,5,grid(1),
circle(1,1,0.2),
circle(2,1,0.2),
circle(2,2,0.2),
circle(1,2,0.2),
blue(line(1,1,2,1)),
blue(line(2,1,2,2)),
blue(line(2,2,1,2)),
blue(line(1,2,1,1)),
graph(300,300,-5,5,-5,5,0,3x))}}}