Metallic/Silver ball high in the sky

I was sitting on back porch when I saw a round metallic type object high in the sky. I thought plane but it moved slowly side to side then up and down.Also thought bird, but again way to high up for a bird. It suddenly disappeared almost like it backed into a cloud but there was no cloud. It appeared again then disappeared. A second metallic ball came out seconds after the 1st one reappeared, when I ran inside to get my camcorder they were completely gone when I came back out.