Beginner python programming (may sound a little bit complicated, but it is actually beginner task for loops).

The task is to model mutation suffrauation. We'll start with two identical sequences. (this can be predefined and random, too, the point being that they are initially identical). Then, at each time step (essentially the steps of a loop/cycle), a random mutation is put in each sequence. The mutations are independent of each other, i.e. their location and the new nucleotide are determined independently. We determine their distance (difference). We do this at least 100x (or any number of times, but at least 2-3 times as much as the length of the sequence) and see how the distance develops.