ColorDream

ColorDream is an interactive daydream for Android devices running Android 4.2 (Jelly Bean) and up.
Watch as color changing trails wander around your screen, or touch the screen to play with them, and they will happily follow your finger as you move it around the screen.
The included settings allow you to customize the daydream to suit your preferences. You may select the desired ranges for the following characteristics:
Count - How many on the screen at one time.
Maximum Size - How big they can be.
Clarity - They can be clear, blurry, or anywhere in between
Speed - How fast they can move
Lifespan - How long they exist, before new ones take their place.
Color Change - how fast they change colors.
Trail Size - How large the trails are.
Brightness - How bright and shiny, or subtle they can be.