increasing concentric circles

By ARJUN

def concentric(x,y,R):
    r=R/3
    shape=circle(x=x,y=y,r=R/3) + circle(x=x,y=y,r=2*R/3) + circle(x=x,y=y,r=R)
    return(shape)

def threeinrow(shape,x,y,r):
    c = shape(x=x-5*r,y=y+r,R=r) + shape(x=x-2*r,y=y+2*r,R=2*r) + shape(x=x+3*r,y=y+3*r,R=3*r) 
    return(c)
d = threeinrow(concentric,x=0,y=0,r=25)
show(d)