snowing

var canvas = window.backgroundCanvas;

var doc = document;


function bgAnimate(){
  canvas.width = window.innerWidth;
  canvas.height = window.innerHeight;
  
  if(canvas.getContext) {
    var context = canvas.getContext('2d');
    var w = canvas.width;
    var h = canvas.height;
    /*
    var img = document.getElementById("star");
    context.drawImage("#star",5,5);
    */
    context.strokeStyle = 'rgba(255,255,255,0.3)';
    context.lineWidth = 4;
    context.lineCap = 'round';
    
    
    
    var init = [];
    var maxParts =50;
    for(var i = 0; i < maxParts; i++) {
      init.push({
        x: Math.random() * w,
        y: Math.random() * h,
        l: Math.random() * 1,
        xs: -4 + Math.random() * 4 + 2,
        ys: Math.random() * 10 + 1
      })
    }
    
    var particles = [];
    for(var i = 0; i < maxParts; i++) {
      particles[i] = init[i];
    }
    
    function draw() {
      context.clearRect(0, 0, w, h);
      for(var i = 0; i < particles.length; i++) {
        var particle = particles[i];
        context.beginPath();
        context.moveTo(particle.x, particle.y);
        context.lineTo(particle.x + particle.l * particle.xs, particle.y + particle.l * particle.ys);
        context.stroke();
      }
      move();
    }
    
    function move() {
      for(var b = 0; b < particles.length; b++) {
        var particle = particles[b];
        particle.x += particle.xs;
        particle.y += particle.ys;
        if(particle.x > w || particle.y > h) {
         particle.x = Math.random() * w;
          particle.y = 20;
        }
      }
    }
    
    setInterval(draw, 50);
    
  }
};

bgAnimate();