*{
  box-sizing: border-box;
}
main{
  background: url(http://nullprogram.com/img/path/simple.gif); no-repeat center center fixed;
  -webkit-background-size: cover;
   -moz-background-size: cover;
   -o-background-size: cover;
   background-size: cover;
  width: 100%;
  height: 1000px;
  border: 10px solid black;
  border-radius: 4px;
  position: absolute;
  
}
main img{
  width: 5%;
  height: 50px;
  border: 3px solid red;
  border-radius: 4px;
  color: blue;
  /* align-items: flex-start; */
  position: relative;
  top: 0px;
  down: 0px;
  left: 0px;
  right: 0px;
  float: left;
}