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              <body id="main-col">
  <div id="lake-div"><img  src="http://jvjulien.free.fr/images/home-lake.jpg">
  </div>
</body>
            
          
!
            
              // d'après https://alligatr.co.uk/lake.js/

(function($) {
  jQuery.fn.lake = function(options) {
    var settings = $.extend({
      'speed': 1,
      'scale': 1,
      'waves': 10,
      'image': true
    }, options);

    var waves = settings['waves'];
    var speed = settings['speed'] / 4;
    var scale = settings['scale'] / 2;

    this.empty();
    var img = document.createElement("img");
    img.src = 'http://jvjulien.free.fr/images/home-lake.jpg';

    this.append(img);
    this.children(0).attr('style', 'display: none;');
    this.children(0).attr('class', 'img-responsive center-block');

    var ca = document.createElement('canvas');

    img.parentNode.insertBefore(ca, img);
    jQuery('canvas').attr('style', 'margin-bottom: -5px;');

    var c = ca.getContext('2d');

    var w, h, dw, dh;

    var offset = 0;
    var frame = 0;
    var max_frames = 0;
    var frames = [];
    var wdiv = $('#lake-div').attr('width');
    var hdiv = wdiv * 0.485;

    c.save();

    c.canvas.width = wdiv;
    c.canvas.height = hdiv * 1.7;

    c.drawImage(img, 0, 0, wdiv, hdiv);

    c.scale(1, -1);
    c.drawImage(img, 0, -hdiv * 2, wdiv, hdiv);

    c.restore();

    w = c.canvas.width;
    h = c.canvas.height;
    dw = w;
    dh = h / 2;

    var id = c.getImageData(0, h / 2, w, h).data;
    var end = false;

    // precalc frames
    // image displacement
    c.save();
    while (!end) {
      // var odd = c.createImageData(dw, dh);
      var odd = c.getImageData(0, h / 2, w, h);
      var od = odd.data;
      // var pixel = (w*4) * 5;
      var pixel = 0;
      for (var y = 0; y < dh; y++) {
        for (var x = 0; x < dw; x++) {
          // var displacement = (scale * dd[pixel]) | 0;
          var displacement = (scale * 10 * (Math.sin((dh / (y / waves)) + (-offset)))) | 0;
          var j = ((displacement + y) * w + x + displacement) * 4;

          // horizon flickering fix
          if (j < 0) {
            pixel += 4;
            continue;
          }

          // edge wrapping fix
          var m = j % (w * 4);
          var n = scale * 10 * (y / waves);
          if (m < n || m > (w * 4) - n) {
            var sign = y < w / 2 ? 1 : -1;
            od[pixel] = od[pixel + 4 * sign];
            od[++pixel] = od[pixel + 4 * sign];
            od[++pixel] = od[pixel + 4 * sign];
            od[++pixel] = od[pixel + 4 * sign];
            ++pixel;
            continue;
          }

          if (id[j + 3] != 0) {
            od[pixel] = id[j];
            od[++pixel] = id[++j];
            od[++pixel] = id[++j];
            od[++pixel] = id[++j];
            ++pixel;
          } else {
            od[pixel] = od[pixel - w * 4];
            od[++pixel] = od[pixel - w * 4];
            od[++pixel] = od[pixel - w * 4];
            od[++pixel] = od[pixel - w * 4];
            ++pixel;
            // pixel += 4;
          }
        }
      }

      if (offset > speed * (6 / speed)) {
        offset = 0;
        max_frames = frame - 1;
        // frames.pop();
        frame = 0;
        end = true;
      } else {
        offset += speed;
        frame++;
      }
      frames.push(odd);
    }
    c.restore();
    if (!settings.image) {
      c.height = c.height / 2;
    }

    setInterval(function() {
      if (!settings.image) {
        c.putImageData(frames[frame], 0, 0);
      } else {
        c.putImageData(frames[frame], 0, h / 2);
      }
      // c.putImageData(frames[frame], 0, h/2);
      if (frame < max_frames) {
        frame++;
      } else {
        frame = 0;
      }
    }, 33);
    return this;
  }
})(jQuery);
/*
$(document).ready(function($) {	
	runLake();
	$(window).resize(runLake);
});
*/
$(window).load(function() {	
	runLake();
	$(window).resize(runLake);
});

function runLake(event)
{
  $('#lake-div').attr('width', $('#main-col').width());	
  $('#lake-div').lake({
    'speed': 1,
    'scale': 0.5,
    'waves': 10
  });	
}

            
          
!
999px
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