2018-02-08 - Aurora, CO - Egg

Was parking my truck walking back to my house, heading southeast. Noticed flashing light like orb it had to be Southwest it seemed in between cherry creek state park & colorado springs it was roughly around 7:15 to 7:45 what was I interesting was it was kind of clear in the sky but yet it seemed like there was a cloud or something around it what struck me that was off it went into a swirling motion it looked like like yin & yang sign them it started to take off heading south for a couple seconds leaving a trail of fumes like it was spraying something and it just disappeared after a few seconds of heading south there were no other colors just a soft whitish blue light that at first looked like a helicopter, but when it start doing that weird swirling thing I knew it was something else" yes I'm definitely saying it look like it went through some type of portal.