h1{
  color:blue;
  }
body{
  background-image: url(back.png);
  background-repeat: repeat;
  background-size: 300px;
  background-position:center top;
  
.tab{
  width:500px;
  position:fixed;
  top:100px;
  left:50px;
      }
      
      
.comp{
  top:1000px;
  left:1000px;
  }
      
 .changeimg {
    width:130px;
    cursor:pointer;
    }
    
.change2.png {
  width:130px;
  }