Untitled

<body>
    <h1>Something</h1>
    <img id="myid" src='images/bigimage.png'/>
    <div id="container">
      <div id="fast-back">
        <p class="big-font">SOMETHING</p>
        <p class="small-font">SOMEThiNG ELSE</p>
      </div>
    </div>
</body>

html {
        overflow-x: hidden;
      }

      body {
        margin: 0;
        padding: 0;
        background: url(images/body-background.png) top no-repeat;
        min-height: 860px;
        height: 860px;
      }

      h1 {
        margin: 0;
        padding: 0;
        position: absolute;
        color: white;
        visibility: hidden;
      }
#container {
        margin: 0 auto;
        padding: 0;
        position: relative;
        min-width: 1336px;
        height: 860px;
        width: 1336px;
      }
#myid{
        position: absolute;
        left: 50%;
        right: 50%;
        margin-left: -1280px;
        margin-right: -1280px;
        z-index: 1004;
      }
#fast-back {
        position: relative;
        margin-left: 15%;  /*it moves even using pixel*/
        top: 272px;
        z-index: 99999;
        text-align: center;
        width: 126px;
      }