Its like watching the weather channel, very simple and boring. What am I making a wish upon? You could make something cool kinda like the circle of the rainbow and after the storm the sun shines through and a rainbow does that refracting thing and it appears and then the storm comes back and washes the rainbow away like water washes away a chalk design. Ex. In your design raindrops are overlapping the rainbow you could show it washing your rainbow away or something.