.red {
 height: 100px;
 width: 200px;
}

body {
  background-image: url(https://u.cubeupload.com/Mugenepic/bluecheckerbackgroun.gif);
 }
 
 .art {
   background-color: black;
   border-radius: 5px;
   Border-color: blue;
   color: blue;
   width: 90px;
   height: 50px;
   font-size: 10px;
   transition-duration: 0s;
  }
  
  .art:hover {
    background-color: blue;
    border-color: black;
    color: black;
  }
  
  .Not_Found {
    color: white;
  }

  iframe {
    border-color: aqua;
    border-radius: 20px;
  }
  
  aside {
    right: 20px;
    left: 70px;
    float: right;
    position: absolute;
  }
  
  .yellow {
    bottom: -300px;
    left: 20px;
    position: fixed;
    height: 700px;
  }
  
  .green {
    height: 400px
  }
  
  .doof {
    right: 10px;
    position: absolute;
  }
  
  .orange {
    right: -1059px;
    bottom: -508px;
    position: relative;
  }