Tweak /todo animations to prevent overlap between sinusoids
Tweak /todo animations to prevent overlap between sinusoids

I'd love to instead allow overlapping to be normal, using
`mix-blend-mode`, but that makes the animation really slow because these
large textures are run in a shader.  So... compromises :-)

arximboldi/sinusoides,arximboldi/sinusoides,arximboldi/sinusoides