2017-10-13 - Sao Bernardo do Campo (Brazil) - Triangle

It was in 2017, I don't remember the month, but I think it was September or October. I was on the balcony as I always do to see the sky, it was about 3 pm, it was the time I always left the house, but I looked to my left, and there was a black triangular shaped UFO, it looked big but it was a little far away, and still standing, I thought it was some balloon or something, but I was still standing, I called one of my relatives to see it, but they thought it was a joke, so I was looking at the ship, it looked like I was paralyzed, suddenly that UFO disappears from nowhere, I never saw it again. (After that I didn't see anything like that, only in 2019 and 2020 that other strange things appeared, I can make other reports if I want).