.image1{
    display: none;
       position: relative;
       position: fixed;
       z-index: 5000;
       bottom:0px;
       left:60px;
       width:60px;
      height:60px;
   }
   .image2{
       display: none;
       position: relative;
       position: fixed;
       z-index: 5000;
       bottom:0px;
       left:0px;
       width:60px;
      height:60px;
       
   }
   .image3{
       display: block;
       position: relative;
       position: fixed;
       z-index: 5000;
       bottom: 0px;
       left: 0px;
       width:80px;
      height:80px;
       
   }


   .image1 img { max-width: 100%;}
   .image2 img { max-width: 100%;}
   .image3 img { max-width: 100%;}



   @media screen and (max-width:769px)
   {
        .image1{
        display:block;
        }
       .image2{
           display: block;
       
       }
       .image3{
           display: none;
       }
     }