.mainImage {
    max-width: 110%;
    max-height: 110%;
    bottom: 0;
    left: 0;
    margin: auto;
    overflow: auto;
    position: fixed;
    right: 0;
    top: 0;
    -o-object-fit: contain;
    object-fit: contain;
}

body {
	#background-image: url("mainImage.JPG");
  background-repeat: repeat;
  background-color: #00001f;
}