a circle of light surrounded by stars in the night sky

Prompt 1: a large blue circle with a bright light in the center, which gradually expands to reveal a larger blue circle with a bright light in the center. ends with the large blue circle with a bright light in the center.

Prompt 2: a blue circle with a bright light in the center, which gradually expands and becomes brighter. the circle then explodes in a burst of light, leaving behind a colorful display.