plot{x^2+y^2=1, (x+1/2)^2+y^2=1/4,(x+3/4)^2+y^2=1/16, (x-1/4)^2+y^2=1/16, (x+7/8)^2+y^2=1/64, (x+3/8)^2+y^2=1/64, (x-1/8)^2+y^2=1/64, (x-5/8)^2+y^2=1/64}