1. 2.& 4.) While waiting for a bus, I looked up into the clear blue sky with very minimal clouds and I noticed a small, oval cloud-like object at first still, then started heading south, but moving slowly. It made a 90 degree turn to its left and then continued southward again, then made a 90 degree turn to its right, and continued on its original southward path. It did not drift, simply made a short adjustment at a clear 90 degree angle, twice. There were no contrails with this cloud-like object, and there were no planes around (heard or seen). This object made no noise.
3.) At first, I thought it was an oval-shaped cloud. The oval object had feathering edges that seemed like a natural cloud, yet as it moved, it appeared to look more clearly oval, yet remained in the white color of a cloud but more clearly defined without feathered edges.
5. & 6.) This is the first time I have experienced a possible UFO. I was very excited. Sorry I did not have a camera. During this brief approximate half-minute, my bus pulled up, blocking my view. Sadly, I got on the bus. It was approximately 10:41am Eastern Time on September 20, 2013 in New York City, in the borough of Staten Island.