UFO Sighting in Dianella, Western Australia on June 21st 2013 – large shape and colour changing object, gold cross, white diamond, red circle, veiwed for about an hour

at about 4am on june 21st 2013, on my way home from a friends house in bayswater, a suburb outside of perth WA. I noticed a strange object in the sky behaving oddly and i new it was a ufo immediately as it's not the first I've seen, while watching this object from the car on my way home i seen the object change from a white diamond to a gold cross to a red circle and back to a white diamond at random intervals. After a 15-20 minute drive i arrived home and with the object still in the sky i decided to get my hd camera and film it, for over 25 minutes i continued to watch the object change shape and colour and record it on film. unfortunately i was getting too tired as it was getting to the point when the sun starts coming up and i still hadn't slept so i didn't get it leaving on film which over time i become increasingly disappointed in myself for not pushing through, however this is just one of dozens of sightings I've had in the Perth area so I wasn't too blown away by the experience however its one of the largest and brightest objects I've ever seen and the encounter is the longest I've ever had.