brain that there's a set length for every step, and you must have a consistent running pattern ... with somewhat equal stride lengths ... no stutter steps!
measure the distance between each tape mark. if they're not consistent, then adjust them slightly so that they are consistent. don't worry if the last step or 2 are a little shorter than the rest ... that's actually good.
repetition ... repetition ... repetition ... until your "bad habit" disappears. 