Disk shape floating going up and down. Lights changed from green to red.I was sleeping and my husband was coming back from work. Not sure if it was around 1:30am or 2:00am. He said he saw something changing colors and going up and down.We live close to the airport for about 14 years and we are used to airplanes, but the object was not like an airplane, it did not move as an airplane, did not sound like it.I went outside with him and I saw when it came up from behind the tree and it did not went up too high (lower than an airplane route). It was not too big, disk shape and the lights were underneath it. The colors of the lights were green (like a traffic light). The part where the lights were I could see rotating. Not sure if the lights were turning off one after another or if the entire set of lights were rotating so fast that it gave me the impression that it was turning off in sequence. No sounds whatsoever.It went down again and within a minute it went up again but now the lights were red (again like the red on the traffic light).The object floated on air each time for about 30 seconds and went down. We waited for a couple of minutes and we went inside.We live near Gatlin and Semoran on Orlando, FL, and there is a park on Gatlin with lots of green space. I'm thinking it was trying to lend there.Fabulous experience. I did not went back inside to get the camera cause I did not want to miss the appearance.