My fastest and slowest cellular automata for level 15.
This one takes 14 ticks or ~2.8 seconds
And this one takes ~750 ticks or ~2:30
my slowest i did not calculate time but it takes forever
also you need 2 rotator cells at the end touching each other both on top most row possible
that one only takes ~20 seconds
I see =¤>=^
¤=>=v