sentence: A girl is riding on a white horse that is in an enclosed obstacle course, but it's just walking, trotting and running around the perimeter doing laps. sentence: Another girl is now the focus and she's riding on a taller brown horse who begins walking, trotting and they also stay on the perimeter of the area. sentence:  When the brown horse is done going around in laps, it walks over to the white horse who is now in the middle of the area and it stops.