Not a craft, but a humanoid being that emanated light...

It was a warm summer night in Illinois and we had family over.  My sister and I who were six or seven years old at the time (twins) were playing in the barnyard away from the adults.  
She and I were sitting on the barn gate when I noticed in the distance over the corn fields a bright light that was coming our way.  It wasn't in a hurry and I was anxious to see what it was.  I continued playing and kind of kept an eye on it's movements.  The closer it got the more I could make it out and it had the most beautiful flowing "gown" that looked luminescent and changed colors as if it were shading.  
It was just to the left of me about 30 feet off the ground when I thought that it was an angel but got the feeling that it wasn't exactly friendly.  As it came directly in front of me I held my breath so as not to be noticed hoping that it would just go away! 
It continued passing by me, and then it stopped, turned it's head sharply and looked directly at me!  It did that for what seemed like an eternity but was only a few seconds.  I saw its eyes, the color of its hair, its face and there was no smile.  It felt sinister.  After it was done sternly looking at me it continued on its way passing over several farm houses until I could no longer see its glowing dress.  
My sister and I ran to the porch where everyone was sitting and they also noticed the bright light but thought nothing of it.  
Did anyone else see that being on that warm summer night in Illinois?  I really need an answer.