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HTML 

              
                <canvas></canvas>
!

CSS 

              
                @import compass

html , body
  background: white
  position: absolute
  height: 100%
  width: 100%
  left: 0
  top: 0

canvas
  position: fixed
  bottom: 0
  right: 0
  left: 0
  top: 0
!

JS 

              
                class ShapeController
	shapes: []
	frame: new Date().getTime()
	vel:
		scrollX: 0
		scrollY: 0
	
	data:
		amount: 24
		scale: 1.25
		minVel: 0.2
		maxVel: 1.0
		allowShuffle: true
		
		colors: [
			"#FA4248"
			"#5DDBBA"
			"#64C3F2"
			"#EDE670"
		]

		shapes:
			rectangle: [
				x: 0.33
				y: -0.33
			,
				x: 0.66
				y: -0.33
			,
				x: 0.66
				y: 1.33
			,
				x: 0.33
				y: 1.33
			,
				x: 0.33
				y: -0.33
			]
		
			triangle: [
				x: 0.5
				y: 0.07
			,
				x: 1.0
				y: 0.93
			,
				x: 0.0
				y: 0.93
			,
				x: 0.5
				y: 0.07
			]

			circle: [ 1 ]
	
			cross: [
				x: 0.33
				y: 0.00
			,
				x: 0.66
				y: 0.00
			,
				x: 0.66
				y: 0.33
			,
				x: 1.00
				y: 0.33
			,
				x: 1.00
				y: 0.66
			,
				x: 0.66
				y: 0.66
			,
				x: 0.66
				y: 1.00
			,
				x: 0.33
				y: 1.00
			,
				x: 0.33
				y: 0.66
			,
				x: 0.00
				y: 0.66
			,
				x: 0.00
				y: 0.33
			,
				x: 0.33
				y: 0.33
			,
				x: 0.33
				y: 0.00
			]

	init: ->
		@.getElements()
		@.initShapes()
		@.render()
		
	getElements: ->
		@.el = document.getElementsByTagName( "canvas" )[0]
		@.stage = @.el.getContext( "2d" )
		
	initShapes: ->
		i = 0
		while i < @.data.amount
			@.addShape()
			i++
			
		console.log @.shapes
			
	addShape: ( type , color , x , y , r , xvel , yvel , rvel ) ->
		buffer = @.data.scale * 250
		types = Object.getOwnPropertyNames( @.data.shapes )
		if type is undefined or types.indexOf( type )is -1
			type = types[ Math.floor( Math.random() * types.length )]
			
		colors = @.data.colors
		if color is undefined or colors.indexOf( color )is -1
			color = colors[ Math.floor( Math.random() * colors.length )]
			
		if x is undefined then x = -buffer + Math.random() * ( window.innerWidth + ( 2 * buffer ))
		if y is undefined then y = -buffer + Math.random() * ( window.innerHeight + ( 2 * buffer ))
		if r is undefined then r = Math.random() * 360

		if xvel is undefined
			dir = 0
			vel = @.data.minVel + ( Math.random() * ( @.data.maxVel - @.data.minVel ))
			if Math.random() > 0.5 then dir = -1 else dir = 1
			xvel = dir * vel
			
		if yvel is undefined
			dir = 0
			vel = @.data.minVel + ( Math.random() * ( @.data.maxVel - @.data.minVel ))
			if Math.random() > 0.5 then dir = -1 else dir = 1
			yvel = dir * vel
			
		if rvel is undefined
			dir = 0
			vel = @.data.minVel + ( Math.random() * ( @.data.maxVel - @.data.minVel ))
			if Math.random() > 0.5 then dir = -1 else dir = 1
			rvel = dir * vel
			
		@.shapes.push({
			type: type
			color: color
			mult: 0.5 + Math.random() * 2
			pos:
				x: x
				y: y
				r: r
			vel:
				x: xvel
				y: yvel
				r: rvel
		})
		
	repo: ( shape , rate ) ->
		buffer = @.data.scale * 250
		shape.pos.x += ( shape.vel.x + ( @.vel.scrollX * shape.mult )) * ( rate / ( 1000 / 60 ))
		shape.pos.y += ( shape.vel.y + ( @.vel.scrollY * shape.mult )) * ( rate / ( 1000 / 60 ))
		shape.pos.r += ( shape.vel.r / 2 ) * ( rate / ( 1000 / 60 ))
		shuffle = false
		
		if shape.pos.x > window.innerWidth + buffer
			shape.pos.x = -buffer
			shuffle = true
			
		if shape.pos.x < -buffer
			shape.pos.x = window.innerWidth + buffer
			shuffle = true
			
		if shape.pos.y > window.innerHeight + buffer
			shape.pos.y = -buffer
			shuffle = true
			
		if shape.pos.y < -buffer
			shape.pos.y = window.innerHeight + buffer
			shuffle = true
			
		if shape.pos.r > 360
			shape.pos.r -= 360
			
		if shape.pos.r < 0
			shape.pos.r += 360
			
		if shuffle is true and @.data.allowShuffle is true
			types = Object.getOwnPropertyNames( @.data.shapes )
			colors = @.data.colors
			
			type = types[ Math.floor( Math.random() * types.length )]
			color = colors[ Math.floor( Math.random() * colors.length )]
			
			shape.type = type
			shape.color = color
		
	draw: ( shape ) =>
		c = @.stage
		s = shape
		p = @.data.shapes[ s.type ]
		m = @.data.scale * 200
		i = 0
		
		c.save()
		c.fillStyle = s.color
		c.translate( s.pos.x , s.pos.y )
		c.rotate( s.pos.r * ( Math.PI / 180 ))
		c.beginPath()
		
		if p.length > 1
			while i < p.length
				x = ( p[i].x - 0.5 ) * m
				y = ( p[i].y - 0.5 ) * m

				if i is 0
					c.moveTo( x , y )
				else
					c.lineTo( x , y )
				i++
		else
			c.arc( 0 , 0 , p[0] * m * 0.5 , 0 , 2 * Math.PI )
			
		c.fill()
		c.restore()
			
	scale: ->
		if @.width isnt window.innerWidth or @.height isnt window.innerHeight
			@.width = window.innerWidth
			@.height = window.innerHeight
			@.el.width = document.body.clientWidth
			@.el.height = document.body.clientHeight

	friction: ( rate ) ->
		if Math.abs( @.vel.scrollX ) > 0.01
			@.vel.scrollX = Math.round( @.vel.scrollX * 0.95 * 1000 ) / 1000
		else
			@.vel.scrollX = 0

		if Math.abs( @.vel.scrollY ) > 0.01
			@.vel.scrollY = Math.round( @.vel.scrollY * 0.95 * 1000 ) / 1000
		else
			@.vel.scrollY = 0
		
	render: =>
		i = 0
		@.scale()
		elapsed = new Date().getTime()
		@.stage.clearRect( 0 , 0 , @.width , @.height )
		@.friction( elapsed - @.frame )
		while i < @.shapes.length
			@.repo( @.shapes[i] , elapsed - @.frame )
			@.draw( @.shapes[i] )
			i++
		@.frame = elapsed
		requestAnimationFrame @.render

window.App = new ShapeController
App.init()
!
999px

Console