Flashing light in Denver, not plane or helicopter.

I was driving home either 12-7-20, or 12-8-20, about 18:30. Driving north on Santa Fe (Highway 85).  Saw unusual light, like an airplane but not.  It was flashing on and off, slower than an airplane strobe, and then would go off completely, and basically disappear for a few minutes, and then I would see it again. It was completely dark out. No red or green lights, no spotlight, did not act like a normal airplane or helicopter.  Came on and then went off three or four times. Stayed in the same general area but was clearly moving. Similar in brightness to Jupiter, I think, but in the opposite direction in the sky.