Ring Breathe

https://www.dwitter.net/d/15175

c.width|=0
p=600/(2*Math.PI)
for(k=7;k--;)for(j=601;a=j--/p*15;)x.arc(960,540,89+k*159+89*S(t+k)*S(j/p+a*k*k)*(S(a-t)),a,a)
x.fill`evenodd`