I was on my house roof and was roaming. then suddenly i noticed a light moving on IGI airport which is near my home. i thought it was an aeroplane but an aeroplane doesn’t stay at a particular place. then after 5-6 sec it started moving towards south around 100 mtrs and then it took an incredible around 120degrees turn. and it moved with a high speed and disappeared in west direction.I come daily on the roof but this was the first incident.i took my phone out to make a video but i think due to low grade phone it is not visible but still i have the video.