This happened in July, 1983. That day I was with my family at Basalety Lake. It was evening and the sky was dark. Suddenly the sky was brightly lit up. I looked up and saw a strange cloud, which had different colors. At first the cloud was small and wasn’t moving. Next it started to increase and turn. After some minutes it opened and transformed into a rainbow. Next the cloud disapearred, leaving behind a blue color.