One can be found under "Congregational Songs Help". Happens to be the first entry I think. I am sure there are others, but I don't know exactly where they are posted. A search might help. One common bass run is 1-3-5-6, then, going to the four, a 1-2-b3-3, 4(1)-3-5-6 and on. Some just play roots with a run here and there. There are some good posts out there. Hope this helps.