Had a poo today it was brown in colour the at the end i pooed yellow runny poo y was this

Stool color: When intestinal contents have more rapid transit through the intestinal tract, feces become loose and may have tan color rather than normal form and brown color. The older feces had time to pigment, but the looser portion didn't. If yellow loose stool persists with or without diarrhea, bile tract or pancreatic disorders or malabsorption should be considered.