This is my first experience and it was when I was about 12 or 13 years old. I was in Colorado visiting my great-grandmother, grandfather, aunt, cousin, and other family. We all had fun then went to my grandmother's house.
As soon as I walked in I knew something was up. I walked past the hallway (it's not really a hallway, it's a door that leads to a very steep set of stairs, and at the top there are two rooms) and I saw a very light, kind of see through figure standing/hovering there. I was frozen. I immediately thought of my grandfather's caretaker, she had fallen down those steps a couple years back (my father told me the story). That's when it moved really fast up the stairs and I heard a door slam. I walked into the kitchen and tried to tell someone, but everyone was busy.
A year later in 2013, it was Thanksgiving and I was at my mother's mom's house and we were taking pictures of our family in their yard, and by the time the day was over, we had to have taken over 100 pictures in total.
When I got back to my house I looked over the pictures and saw some very vibrant colored orbs. Some were golden, some were blue and some were green. And some were even all three colors. But the weirdest thing I saw was that the orbs were only in the pictures I was in. I know I sound vain but I'm not trying to! I zoomed in on one of the more vibrant orbs and saw my grandfather's face. I nearly started crying. That's when my dad walked into the living room, holding his phone and he looked like he had just seen a ghost. He said that my grandfather had just passed away two days before. I looked back at the orb and saw that his face was gone.
A couple days later I noticed a yellow orb in a picture, so I looked up the colors' meanings. Blue is a happy spirit. Green is a relaxed spirit. Gold in bringing good luck. And yellow is a warning. Two years later my aunt died.