Viewed stealth craft in night sky

My son and I were viewing meteor showers the night of 8/13/23. At appx 11pm we both saw a craft moving north to south at a high speed. It flew along the east side of town. We estimated 1500 to 2500 ft high altitude. It appeared to be tracking another aircraft. We observed it moving over Springville, at which time visibility and detail of craft improved long enough to see that it was clearly a stealth craft of human origin, but flew silently and without visible propulsion. I was able to see it clearly for several seconds. It resembled the stealth bomber (B52?), however with a much larger fuselage and shorter wings. It had no visible signs or markings. It continued over Spanish Fork, where it suddenly made about 10 circular loops (maybe .25 to .5 mile diameter loops) at extremely high speed...we calculated that each loop lasted appx 1 to 1.5 seconds. After the 10th loop, it shot due south over the southern mountain ranges at an incomprehensible speed and disappeared. My 24 yr old son, a UVU college student, witnessed the event. Neither of us has ever seen unidentifiable objects in the sky, and have always been skeptical of such things. However, there is no doubt we saw a stealth craft, human origin, and of incredible speed and movement that defied traditional, known or disclosed technology. Proximity to Hill AFB just 70 miles north of our home is also a consideration as craft seemed to be military in nature.