Changing size and color object, over Fort Mohave AZAt about 10 am this morning, I was returning home from prospecting, when i saw a object in the southwest sky at about 45 degrees.At first i thought it was a balloon or the space station, It kept chaging color and size, from shiny to dull, like it was tumbling but no set speed, random size change also.The largest it got was about three times bigger then the brightest star down to about the brightest star.I watched it fly over me to the northeast for a total of about 4 minutes at times it appeared to stop. I looked away for a few seconds trying to take a photo with my cell phone, but i couldn't figure out how, In those few seconds it moved very far, just about out of site.I'm 56 years old,Have never seen anything like this, I got scared, The hair stood up on the back of my neck and i got goose bumps..I hope it was a weather balloon,or something like that But something inside say's it wasn't.I have no idea how big it was,speed,or how far away,made no sound."Strange days indeed"