Walking Bass

I'm figuring out the walking bass (on piano). The root of the chord goes on the "1." The 4 can be a note a half step lower than that root. Ascending lines are better than descending ones, all other things being equal; stepwise motion is better than longer leaps. If there is the same chord over two measures, you can have a good deal more freedom in the second measure. If there are two chords in a measure, you can basically do the roots and the half-steps below them. The trick is to play with a metronome over a given set of chord changes repeatedly.