screen 12
dim x(8),y(8)
d=145
s=d
xo=250
yo=312
x(1)=xo-d: y(1)=yo-d
x(2)=xo+d: y(2)=yo-d
x(3)=xo-d: y(3)=yo+d
x(4)=xo+d: y(4)=yo+d
x(5)=xo-d+s: y(5)=yo-d-s
x(6)=xo+d+s: y(6)=yo-d-s
x(7)=xo-d+s: y(7)=yo+d-s
x(8)=xo+d+s: y(8)=yo+d-s
line(x(1),y(1))-(x(2),y(2))
line(x(1),y(1))-(x(3),y(3))
line(x(1),y(1))-(x(5),y(5))
line(x(2),y(2))-(x(4),y(4))
line(x(2),y(2))-(x(6),y(6))
line(x(3),y(3))-(x(4),y(4))
line(x(3),y(3))-(x(7),y(7))
line(x(4),y(4))-(x(8),y(8))
line(x(5),y(5))-(x(6),y(6))
line(x(5),y(5))-(x(7),y(7))
line(x(6),y(6))-(x(8),y(8))
line(x(7),y(7))-(x(8),y(8))
for i&=1 to 8
	circle(x(i&),y(i&)),20
next i&