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HTML

              
                <div class="preloader">
  <div class="spinner-2 spinner4">  </div>
</div>
<div class="content">
  <div class="bubbles"></div>
</div>
<!--https://codepen.io/bh/pen/JBlCc?editors=1010-->
              
            
!

CSS

              
                .preloader
  width: 100%
  height: 100%
  background: #000
  position: absolute
  top: 0
  left: 0
  z-index: 999
.content
  width: 100%
  height: 100vh
  background: -webkit-linear-gradient(#1A3742, #9EA183)
 
.bubbles
  width: 100%
  height: 100%
  overflow: hidden
.bubble
  width: 6px
  height: 6px
  border-radius: 50%
  border: 1px solid rgba(255,255,255,0.5)
  background: rgba(255,255,255,0.25)
  will-change: transform
  transition: 2s
  
  &:hover
    transform: scale(2)
    background: #ffbf80
  
.bubble-container 
  position: absolute
  bottom: 0
  animation: bubbleRise 10s infinite ease-in,
  will-change: transform
  
@keyframes bubbleRise
  0%
    opacity: 0
    bottom: 0
  15% 
    bottom: 0
    opacity: 0.1
    margin-left: 0px
  25%
    opacity: 0.5
  50%
    opacity: 1
    margin-left: 50px
  100%
    bottom: 100%
    opacity: 0
 
.spinner-2
  width: 100px
  height: 100px
  border-radius: 50%
  position: relative
  margin: 50px auto
  display: inline-block
  border: 3px solid transparent
  border-top-color: orange
  animation: spinall 2s linear infinite
  &:after, &:before
    content: ''
    display: block
    width: 85px
    height: 85px
    border-radius: 50%
  
.spinner4:after
  position: absolute
  top: 3%
  left: 3.5%
  border: 3px solid transparent
  border-top-color: orange
  animation: spinall 3s linear infinite
.spinner4:before 
  width: 75px
  height: 75px
  position: absolute
  top: 10%
  left: 10%
  border: 3px solid transparent
  border-top-color: orange
  animation: spinall 2s linear infinite
 
@keyframes spinall
  0%
    transform: rotate(0deg)
  50%
    transform: rotate(90deg)
  100%
    transform: rotate(360deg)

              
            
!

JS

              
                $(document).ready(function() {
		// Animate loader off screen
		$(".preloader").fadeOut("slow");;
	});
var bubbles = $('.bubbles');
function renderBubbles() {

    // bubble properties
     var max_bubbles = 30,
      min_bubbles = 50,
      max_bubbleSize = 10,
      min_bubbleSize = 18,
     total_bubbles = max_bubbles + Math.floor(Math.random() * min_bubbles + 1) ;
     for(var i = 0; i < total_bubbles; i++){
     	bubbles.append("<div class='bubble-container'><div class='bubble'></div></div>");

     }
     //set css property of .bubbble and .bubble-container
     bubbles.find('.bubble-container').each(function(){
     	var bubble_size = max_bubbleSize + Math.floor(Math.random() * min_bubbleSize + 1); 
        var bubble_pos = Math.floor(Math.random() * 100 + 1);
        var blur_size = 0 + Math.floor(Math.random() * 3 + 1);
        var animation_delay = 10 + Math.floor(Math.random() * 18);
        var random_margin = 50 + Math.floor(Math.random() * 100)
        var $this = $(this);

        var mX, mY, distance, mX_stored, mY_stored;

	    function calculateDistance(elem, mouseX, mouseY){
	    	return Math.floor(Math.sqrt(Math.pow(mouseX - (elem.offset().left+(elem.width()/2)), 2) + Math.pow(mouseY - (elem.offset().top+(elem.height()/2)), 2)));
	    }

	    $(document).mousemove(function(e) {  
      	mX = e.pageX
        mY = e.pageY;

        distance = calculateDistance($this, mX, mY); 

        if(distance < 50){
        	console.log('yes');
        	$this.children('.bubble').css({
	    			'background': 'rgb(255, 214, 153)',
	    			
	    		});
        }  
        else if(distance > 70){
        	$this.children('.bubble').css({
	    			'background': 'rgba(255,255,255,0.25)',
	    			'transform': 'scale(1)'

	    		});

        }

    	});
	    
        $this.css({
        	'left': bubble_pos + "%",

        	'-webkit-filter' : 'blur('+ blur_size + 'px)',
        	'-moz-filter' : 'blur('+ blur_size + 'px)',
        	'filter': 'blur('+blur_size + 'px)',
        	'-webkit-animation-duration' : animation_delay + 's',
        	'-moz-animation-duration' : animation_delay + 's',
        	'animation-duration' : animation_delay + 's',
        });
  


         $this.children('.bubble').css({
     	'width': bubble_size + 'px',
     	'height': bubble_size + 'px'	
   	  });

         
    });

    
}
renderBubbles();



              
            
!
999px

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