original: The spot was observed at different times with different sizes and shapes.
simplifications: The spot was watched over at different times with different sizes and shapes. The spot was seen at different times. It also had different sizes and shapes. The spot was observed at different times, sizes and shapes. The spot was watched at different times with different sizes and shapes. The spot was seen at different times with varying sizes and shapes. The spot was seen at different times. It had different sizes and shapes. The spot was seen to be different sizes and shapes at different times. The spot was seen at unlike times/sizes/shapes. The spot was found at different times in different sizes and shapes. The spot was seen at different times with different sizes and shapes.