Shadow

Im still not sure what I saw last night maybe it was a person maybe it was something else, but last night around 4am I was sitting in bed and I seen a shadow go past my window and immediately I went to my front door to see who it was and no sign of anyone so I checked every window on the side I seen the shadow go towards and nothing. My bedroom is by my front yard and my front yard has a chain length fence around it so I know it wasn’t just a random person walking by.