javascript - How to stop animation on background image -


i have animation on background image in website, image moving on left time when image come end start again. problem when image come end (left side) edges visible , want when come left side go right, when come right side..on left again.

var x=0; var y=0;  var banner = $("#loading"); banner.css('backgroundposition', x + 'px' + ' ' + y + 'px');  window.setinterval(function(){ banner.css('backgroundposition', x + 'px' + ' ' + y + 'px'); x--; }, 90);

here's example animation:

var x = 0;    var fps = 30;  var speed = 2;    var bannerwidth = 400;  var imagesize = 128;    setinterval(function() {      x += speed;            if (x >= bannerwidth-imagesize || x <= 0) {      	speed *= -1;      }            $("#banner").css("backgroundposition", x + "px 0");  }, 1000/fps);
#banner {      width: 400px;      height: 128px;      border: 1px solid red;      background-image: url("http://icons.iconarchive.com/icons/position-relative/social-1/128/google-icon.png");      background-position: 0 0;      background-repeat: no-repeat;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div id="banner"></div>

i can modify example if provide html & css.


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