Here is a very basic simulation to show some important concepts to people not experienced in running long simulations.
Mister Magoo is a curious bot - it does not use eyes at all. It runs forward until it bumps into something, then it checks that it's not its own species and starts feeding.
As a result, Mister Magoo is a very inefficient bot. Let me show you how you can run a long sim with this bot.
Since this bot is a very poor hunter, it requires a high concentration of food in the environment, so we are forced to use a small-size playing field. I used the second smallest one (16000x12000). If you go bigger, then simulation slows down too much. If you go smaller, then you run into a very small population size of Mister Magoo, which may die out simply by chance.
I used the default veggie (Alga minimalis), but gave it only 1 energy per cycle and set the limit of population to 300 so that Magoo had time to catch up to growing veggie population.
The last thing that's worth mentioning here is that I had to jump-start the sim by placing a lot of bots on the field in the beginning - 150 veggies, 200 bots.
This is it - all other settings are at default and the simulation runs for millions of cycles with bot population oscillating between 100 and 300 bots. Enjoy!
Edit: This post refers to 2.36.7 version of DB.