I live near DIA Airport and was putting some things away and I looked up thru the window and saw five objects that did not appear to be moving so I started to watch them and then I realized planes were coming and going but these were not moving. The objects were blinking red and green and one started to get very bright like a star and then it went back to the red/green color lights but three more objects appeared and I watched the objects for about thirty minutes until they moved towards the East and were gone. I am not shocked to see them but am excited to have witnessed them.