Cells should choose random directions if no food is found

[m1rza-s]

Describe the issue:

Currently, every breed has a default direction it goes towards if it finds no food. This looks like a herd moving together, but it's a bit weird.

Propose a solution:

Every once in a while if no food is found, each individual cell should choose a random direction to move. However, cells should sporadically change their direction.