Blue/white ball of light falling toward Earth, and same color arrow shaped light which lit up in front of/below it.I have not done this before, do not think this was a UFO, wasn't sure who to report to. Driving up into Diamond Valley, AZ, facing hills in background. Bluish/white, bright, round ball of light appeared x 2 seconds and slight arch as it fell toward the earth; then below it/projected from it, appeared an arrow shaped bluish-white light (like ball) which pointed toward/fell straight toward Earth (an elongated outline of exit sign is the closest to arrow I can describe in shape); then arrow gone in a second too (the ball disappeared after arrow appeared below it, then arrow disappeared). It is very cloud covered (happened about an hour ago) so it is possible I did not see the fall of this light all the way from high in the sky; it seemed to appear suddenly not far above the hills just above the clouds, fall out of the clouds, produce the arrow, then ball/arrow disappeared before they contacted earth (I think). Also, when I got out of car to look more at sky (did not see anymore lights); cloud covering over sky formed a huge perfectly round circle around the moon/the moon's light (the clouds were absent in this area...a natural event, but wanted to be thorough in everything I reported). I have lived in AZ a long time, have seen lots of lights, all have had reasonable explanations. However, I have NEVER seen anything like this. I have considered that the "arrow" could have been some kind of reflection off the clouds from the original ball of light (I am a skeptic in all things and must have evidence), but the ball of light and arrow emerged from the clouds. The entire thing lasted 3-4 seconds max. Very odd.