A few primitives and a lot of points.

Warning: This piece is GPU intensive, it may not render on lower end devices.

Keys
s: Take a screenshot
space: Pause/Play the animation.
r: Play a new animation
↑: Increase point alpha
↓: Decrease point alpha
→: Increase point density
←: Decrease point density

URL Params
w: Width of the canvas - (ex, w=1024) - [0-2048]
h: Height of the canvas - (ex, h=1024) - [0-2048]
a: To set the alpha for the points - [0.0-1.0]
p: To set the total number of points to draw (in millions) [1-8]
s: Make the visual static - (ex, s=1)