Black Triangle Sighting in L'Ardoise, Nova Scotia on 2017-06-25 00:00:00 - Very large black triangle with flashing light on each corner

Very large black triangle with a flashing light on each corner slowly rotating while moving in a straight flight path with no noise. appeared out of nowhere and as it moved west seemed to slowly fade away although no clouds were present. entire event was approx 30 mins. my friend and i both witnessed it. it was very clear and apparent this was not helicopters in formation as it moved and rotated as one solid object.