Unreflective Ground is grass.
It is night.
A ufo 10 feet above the alien.
A white 1st light is on the ufo.
A white 2nd light is 5 feet above the alien.
A 1st cow 5 meters right of the alien is facing left.
A 2nd cow 5 meters south of the 1st cow facing the alien.
A 3rd cow 5 meters south of the alien is facing north.
A 4th cow 1 meter right of the 3rd cow facing the alien.
A barn 20 meters infront of 3rd cow.