Oh I see.
I've noticed something else as well. If I try to enter a value above 3 (lets say 4 in this instance), it resets to 0.
However, if I enter in the value 5, it changes it to 1.
It does this for every subsequent value after 5 (i.e 6=2, 7=3, 8=0, etc.)
Is there a reason behind why it does that? I'm sorry if this question seems a bit stupid, I don't really understand all of this too much.