Domino organisms

Imagine an intricate pattern of dominoes that, in the process of tipping each successive domino over, also somehow managed to upright an equal number of dominos that it eventually connected to and allowed itself to continue going indefinitely.

A self-sustaining domino organism, of sorts.

Now imagine that it was sufficiently complex that it could split its domino stream into two now separate domino streams, each individually able to self-sustain its flow by uprighting at least as many dominos as it toppled.

A self-sustaining, self-replicating domino organism.

Now imagine that there was enough environmental pressure to provide some level of competition amongst domino organisms, and natural selection was allowed to occur.

A self-sustaining, self-replicating, evolving domino organism.

Is that us?