Small, star-like object appears in Oregon nighttime sky.

I was standing on my back deck, bending my neck about half way up to look at the stars.  I always look at the stars at night when the night is clear. That night, it was pretty clear so I admired the stars. However, upon admiring, I noticed a very small object I perceived as a star but then later realizing it was an unknown object, perhaps a craft. There are very tall pine trees in neighboring yards, the sky was a medium night sky blue with little grey clouds, and this unknown object was hovering right above the top point of a pine tree. There were few clouds out that night and the object was in front of a small, grey cloud. I thought I saw it slightly moving and thought, “ It’s just how stays shimmer.” I was mistaken, I froze in a sort of fear and every time I saw the object move, I became terrified, shouting, “No!” Every time. The object was a little bigger than a star, it seemed to look like that on purpose. It was diamond shaped, with the bottom coming to! a point. It would move side to side and up and down; as it moved side to side, you could see the outline of the shape of the object. I felt as though this was something most people weren’t supposed to see. I’ve never felt this way about anything. It was intelligent, with its moves and shimmering, like it wanted me to notice it, like it was playing a little game. If shined bright like a diamond, like a star, no lights, no flashing, just a simple object replicating a star. The next day, I noticed two small places in the area looking for something. There are no coincidences. There’s always a small aircraft flying around my neighborhood, we see it every night. This object I observed was not something I’ve ever seen before. Although I believe the event lasted around six minutes, when I came back inside my apartment, I realized time went from 12:17am- 12:49am and I know I wasn’t out there that long.