I was outside looking for the ISS to go over (Coffs Harbour, NSW). Facing wrong way (East) and suddenly a triangle shaped 'craft' appeared over the top of my house, back a bit. Came from behind trees. I was attracted by the three pulsating lights at first. Could see they were in a triangle shape. I didn't know what to make of it. Never seen anything like it, nor pictures at that time. Lights were red (top of triangle), yellowy green and then white. Very bright and flashed sequentially. It hovered for about 5 seconds, then shot off south for a little way (about 2 secs) then banked East towards the airport (near the Ocean) and disappeared. I felt that was because the lights were now facing away from me. It moved vertically, not horizontally during the time I saw it. There was no sound at all. All I could hear was the highway very, very faintly but no sound from whatever it was in the sky. Was not a plane nor a helicopter nor a drone (unless deathly silent) but did not look like a drone. It was exciting to see it. My son (on the balcony of the house and unable to see it) could hear me describing what I saw. I was at the top of my driveway on a hill. It has been 'playing' on my mind for the past 4 days and I still feel a very strong sense of elation and excitement. The colour looked as though it was black with grey edges. It was a definite triangle. (see pic).