Impressive Sphere animation in 317 bytes

var d = document,
canvas = d.body.appendChild( d.createElement( 'canvas' ) ),
context = canvas.getContext( '2d' ),
time = 0,
w = canvas.width = innerWidth,
h = canvas.height = innerHeight,
m = Math,
cos = m.cos,
sin = m.sin,
PI = m.PI

// The main animation loop
setInterval( function() {
// Clear
canvas.width = canvas.width;

time += .1;

// The number of particles to generate
i = 10000

while( i-- ) {
// The magic

r = (w+h)/2 * ( cos( ( time + i ) * ( .05 + ( sin(time/100000) / PI * .2 ) ) ) / PI )

context.fillRect( sin(i) * r + w/2,
cos(i) * r + h/2,
1.5,
1.5 )
}
}, 16 )