Two alternative monodimensional 'quasi-continuous' cellular automata [Deux automates cellulaires 'quasi-continus' monodimensionnels alternatifs].
This picture was computed using alternatively (50 lines for the first one, then 50 lines for the second one, and so on...)
the two following monodimensional "quasi-continuous" cellular automata:
with the following initial conditions:
(only the bottom line is useful and is used periodically).