clf;

axis ([-300 0 -150 150]);
circle(-150,0,145.);
hold on;


circle(-145,0,135.);
circle(-140,0,125.);
circle(-135,0,115.);

circle(-130,0,105.);
circle(-125,0,95.);
circle(-120,0,85.);

circle(-115,0,75.);
circle(-110,0,65.);
circle(-105,0,55.);

circle(-105,0,50.);
circle(-105,0,45.);
circle(-105,0,39.);

circle(-105,0,32.);
circle(-105,0,22.);


