Extremely bring light that lasted for about 10 seconds in the sky then it sped off

At approx 3:34 am mtn time i was on my phone in my bed when i mommy room light up with a extremely bright light, i looked out of my window which was right behind my head, i saw that the light came from the sky and there is no lights above my house. it stared at it for about 10 seconds before it took off into the sky at a very fast rate of speed (around 500mph if i had to guess). it dissapeared into they sky almost instantly leaving behind a trail of glowing stardust like matter in the sky, after a few seconds of it leaving i heard footsteps at my door but nobody was there, my dog also started barking the second it happened. i did not belive ufo’s were real until this moment this is indefinite proof that they are real