body {
background: url(http://andreypokrovskiy.com/image_hosting/boredom/space-bg.jpg) repeat;
animation: backdrop_roll linear 100s infinite;
}
.enemy-animation {
position: relative;
z-index: 1;
animation-direction: alternate;
animation-duration: 3s;
animation-name: oscillate;
animation-iteration-count: infinite;
}
#ship {
position: absolute;
width: 100px;
height: 100px;
top: 90%;
left: 50%;
margin-left: -50px;
background: url('http://andreypokrovskiy.com/image_hosting/boredom/space-ship.png');
z-index: 1;
}
@keyframes oscillate {
from {
left: 0%;
}
to {
left: calc(100% - 200px);
}
}
@keyframes backdrop_roll {}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js'></script>
<script src="game.js"></script>
<link rel="stylesheet" href="style.css">
<title>Shooting Game</title>
</head>
<body>
<div class="sky"></div>
<img class="enemy-animation" src="ship1-concept-finished-smaller.png" width="200" alt="enemy spaceship">
<div id="ship"></div>
</body>
</html>I am looking for a way to create the illusion of movement in the background sky image as if the ship is moving by using keyframe animations. I attempted this by adjusting the CSS properties on a div element successfully, but not on the body itself.
@keyframes backdrop_roll { from { top: -630px; } to { top: 0; } }