html { 
  background: url(waves.jpg) no-repeat center center fixed; 
 -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover
}

h1
{color: red;
font-size: 20px;
margin-top: 14%;
margin-left: 20% }


.A{color: black;
font-size: 40px;
margin-top: 10%;
margin-left:78% }

.B{color: red;
font-size: 40px;
margin-top: 14%;
margin-left:83% }