Around 9:15pm, my friend and I were walking to the bus stop when she pointed out what we originally thought to be a plane. After becoming unusually drawn to the sight, the first thing we noticed was three bright lights on each corner of the craft. It moved smoothly and quickly, travelling lower to begin with but just doing a complete U turn. As it was turning we could see the outline as a large triangular shape, seemingly dark grey with bright lights on each corner. As soon as we realised it didn't look like a plane we got our phones out to take a picture and as soon as we were ready it had completely disappeared. We started to discuss any logical explanation of what it could be for about 30 seconds when we saw it again, higher and travelling in the direction that would complete a circle, before dropping lower again, this time behind a building where we lost sight. We have discussed the possibility of a drone but it just seemed far too large and with a definite shape of a triangle and it moved in too much of a strange way to be a plane.