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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div class="gradient">
    <h1>Random Color Background</h1>
</div>
            
          
!

CSS

            
              h1 {
  width: 100vw; height: 100vh;
  display: flex;
  align-items: center;
  justify-content:center;
}
            
          
!

JS

            
              var colors = new Array(
      [62,35,255],
      [60,255,60],
      [255,35,98],
      [45,175,230],
      [255,0,255],
      [255,128,0]);

    var step = 0;
    //color table indices for: 
    // current color left
    // next color left
    // current color right
    // next color right
    var colorIndices = [0,1,2,3];

    //transition speed
    var gradientSpeed = 0.002;

    function updateGradient(){
  
        if ( $===undefined ) return;
      
        var c0_0 = colors[colorIndices[0]];
        var c0_1 = colors[colorIndices[1]];
        var c1_0 = colors[colorIndices[2]];
        var c1_1 = colors[colorIndices[3]];
    
        var istep = 1 - step;
        var r1 = Math.round(istep * c0_0[0] + step * c0_1[0]);
        var g1 = Math.round(istep * c0_0[1] + step * c0_1[1]);
        var b1 = Math.round(istep * c0_0[2] + step * c0_1[2]);
        var color1 = "rgb("+r1+","+g1+","+b1+")";
    
        var r2 = Math.round(istep * c1_0[0] + step * c1_1[0]);
        var g2 = Math.round(istep * c1_0[1] + step * c1_1[1]);
        var b2 = Math.round(istep * c1_0[2] + step * c1_1[2]);
        var color2 = "rgb("+r2+","+g2+","+b2+")";
    
        $('.gradient').css({
            background: "-webkit-gradient(linear, left top, right top, from("+color1+"), to("+color2+"))"}).css({
            background: "-moz-linear-gradient(left, "+color1+" 0%, "+color2+" 100%)"});
      
        step += gradientSpeed;
        if ( step >= 1 ){
            step %= 1;
            colorIndices[0] = colorIndices[1];
            colorIndices[2] = colorIndices[3];
    
            //pick two new target color indices
            //do not pick the same as the current one
            colorIndices[1] = ( colorIndices[1] + Math.floor( 1 + Math.random() * (colors.length - 1))) % colors.length;
            colorIndices[3] = ( colorIndices[3] + Math.floor( 1 + Math.random() * (colors.length - 1))) % colors.length;
        }
    }

    setInterval(updateGradient,10);
            
          
!
999px

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