Reverse the rings

[Milan3792]

Is it possible to make rings go inwards with animation? Like there will be big rings and then it get smaller and smaller?

I tried to reverse the line numbers 133 and 134 in PulsingHaloLayer.m like below:

scaleAnimation.fromValue = @1.0;
scaleAnimation.toValue = @(self.fromValueForRadius);

But this gives me weird blink effect.