"Hearts 3" in 218 chars of
#GLS:
vec2 p=(FC.xy*2.-r)/r.y,a;for(float i;i <20.;i,o =(cos(sin(i*.2 t)*vec4(0,4,3,1)) 2.)/(i/1e3 abs(length(a-.5*min(a a.yx,.1))-.05)))a=(fract(t*.2 p*.3*i*rotate2D(cos(t*.2 i*.2)))-.5),a=vec2(a.y,abs(a));o=tanh(o*o/2e5);