Large white light near Silver City, Iowa.

I don't recall the month, day, or year, but I'm certain that it was in the late 60s.  
I was a teenager, and I had just gone to bed in our home which was on a farm near Silver City, Iowa.  I had not been asleep. I saw what at first I thought was a falling star.  It became larger, and then I thought it was a meteorite. It didn't hit the ground, but rather shot back up at what I recall as being a 45 degree angle. 
Then, It darted up somewhere over or on the other side of our house. I remained in bed and watched the sky.  Several seconds later, it returned and darted over to an area where there are trees and a creek.  I remember it as being a rather large white light and approximately the size of a one of those big therapy balls.  I didn't hear any sound. 
It moved along about half the heighth of the trees.  It then zipped through the air very quickly over to a hill located from the same field that I first sighted it in.  It did not land.  I saw it spin several times for just a few seconds. 
It then darted back up into the sky at about a 45 degree angle at about the same location as it first appeared.  I went and woke up my mother and told her about it.  We watched the sky for awhile, but it never returned.  I remember that there were other reports of sightings around the Malvern, Iowa area in that year also.
Witness indicates that the date of the incident is approximate.  PD