UFO Sighting in San Antonio, Texas on June 30th 2015 – a light like a star was moving abruptly left to right up and down made a box shape then absorbed a smaller light moving towards it from the east

I was coming home from work for a few hours because my department was over staffed and I'm usually there all night.it was a perfect night for star gazing I noticed a unusually bright star to the west about ten o'clock high to the east was another star and to the east of that was the moon two day's from full all along the same plane.I looked at the star for a few seconds maybe a minute and it appeared to jump I refocused my eyes and continued to watch it began to move erratically left to right, up and down, dropping and then raising. It then would zig zig, peak the valley, zig zag back and peak the valley. It then made a box pattern. Then to the east a smaller less bright light approached the bigger light, I thought it was a plane, I expected it to pass through and come out the other side but it didn't the bigger light absorbed the smaller light. I then turned away and refocused my eyes and looked back, the star was still jumping around. I got scared and went inside. I then went back outside to return to work 45 mins later. The moon and it's accompanying star had moved and wet still visible, but the light that was at 10 o'clock was nowhere to be seen, above or below its former position.this actually was the third sighting of the moving star. I refused to believe it the first two times. I'm just wondering if anyone else has noticed strange lights.