I was on the terrace in my home (Lugano - Federal District in Argentina),about to lock a door when suddenly a strong wind started to blow, before i lock the door i have the urge to see in the sky, it was clean without a cloud, then i see 3 lights up high in the sky, The lights get away so faster to the west and suddenly they change their form, 1st they were like in a lineal form and then they've change their form on a triangular one and dissapeared in the sky while they spin.