Above you can see a 1D cellular automaton using probabilities to determine life and death of cells. Choose the probabilities p1,p2 and p3 (in percents) and see some nice patterns arose.

Here's the principle: We compute one line after another,
and to know the new living/dead state of a cell, we check
the previous state of it and both its neighbours. Let's mark
` *` a living cell and

Some values to try for (p1;p2;p3):

(90;70;60) which is default

(95;10;90) vertical raindrops

(100;70;35) kind of triangles appearing

(0;100;100) funny and small arches but no need for randomness here ;)

(100;0;0) another non random 1D cellular automaton