Question 841261
{{{drawing(300,300,-6,6,-3,9,grid(1),
circle(3,0,0.2),circle(3,8,0.2),circle(-2,6,0.2),circle(-2,-2,0.2),
line(3,0,3,8),line(3,8,-2,6),line(-2,6,-2,-2),line(-2,-2,3,0),
blue(line(-2,-2,3,8)),blue(line(3,0,-2,6)),green(circle(0.5,3,0.3)))}}}