Follow along with the video below to see how to install our site as a web app on your home screen.
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<html>
<head>
<style>
.container {
    position:relative;
     width: 50%;
    }
    
@media (max-width: 800px) {
    .container {
        width: 100%;
        }
}
.container:before {
    content: "";
    display:block;
    padding-top: 100%;
    }
.grid-container {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    padding: 0;
    position: absolute;
    left: 0;
    top: 0;
    margin: 0;
    }
.grid_3x3 {
    display: inline-block;
    height:100%;
    width:100%;
    position: relative;
    text-align:center;
    }
.block {
    float: left; 
    top: 0;
    width: 33.3333%;
    height: 33.3333%; 
    position: relative;
    display: inline-block;
    width: 33.3333%;
    height: 33.3333%;
    box-sizing: border-box;
    padding: 0px;
    overflow: hidden;
    Border:#000 solid 1px;
    }
.block .img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
     }
.grafik01 {background-image: url("");}
.grafik02 {background-image: url("");}
.grafik03 {background-image: url("");}
.grafik04 {background-image: url("");}
.grafik05 {background-image: url("");}
.grafik06 {background-image: url("");}
.grafik07 {background-image: url("");}
.grafik08 {background-image: url("");}
.grafik09 {background-image: url("");}
    
</style>
</head>
<body>
<div class="container">
<div class="grid-container">
  <div class="grid_3x3">
    <div class="block"><div class="img grafik01">Lorem ipsum dolor sit amet.</div></div>
    <div class="block"><div class="img grafik02">Consetetur sadipscing elitr.</div></div>
    <div class="block"><div class="img grafik03">Sed diam nonumy eirmod tempor invidunt ut</div></div>
    <div class="block"><div class="img grafik04">Consetetur sadipscing elitr.</div></div>
    <div class="block"><div class="img grafik05">Sed diam nonumy eirmod tempor invidunt ut.</div></div>
    <div class="block"><div class="img grafik06">Lorem ipsum dolor sit amet.</div></div>
    <div class="block"><div class="img grafik07">Sed diam nonumy eirmod tempor invidunt ut.</div></div>
    <div class="block"><div class="img grafik08">Lorem ipsum dolor sit amet.</div></div>
    <div class="block"><div class="img grafik09">Consetetur sadipscing elitr.</div></div>       
 </div>
</div>
</div>
</body>
</html>
	nav a {
    display:none;
    }
	nav a {
    visibility:hidden;
    }
   
nav a:focus, nav a:hover, nav a:focus, nav a:hover {
    visibility:visible !important;
    }
	<html>
<head>
<style>
.container {
    position:relative;
     width: 75%;
    }
   
@media (max-width: 750px) {
    .container {
        width: 100%;
        }
}
.container:before {
    content: "";
    display:block;
    padding-top: 100%;
    }
.grid-container {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    padding: 0;
    position: absolute;
    left: 0;
    top: 0;
    margin: 0;
    }
.grid_3x3 {
    display: inline-block;
    height:100%;
    width:100%;
    position: relative;
    text-align:center;
    }
.block {
    float: left;
    top: 0;
    width: 33.3333%;
    height: 33.3333%;
    position: relative;
    display: inline-block;
    width: 33.3333%;
    height: 33.3333%;
    box-sizing: border-box;
    padding: 0px;
    overflow: hidden;
    /*Border:#000 solid 1px;*/
    background-color:#CCC;
    }
.block .img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
     }
   
div.img {
    display: flex;
    align-items: center;
    justify-content: center;
    background-size:contain;
    }
       
.grafik01 {background-image: url("grafik01.jpg");}
.grafik02 {background-image: url("grafik02.jpg");}
.grafik03 {background-image: url("grafik03.jpg");}
.grafik04 {background-image: url("grafik04.jpg");}
.grafik05 {background-image: url("grafik05.jpg"); background-color:#e31a20; color:#FFFFFF;}
.grafik06 {background-image: url("grafik06.jpg");}
.grafik07 {background-image: url("grafik07.jpg");}
.grafik08 {background-image: url("grafik08.jpg");}
.grafik09 {background-image: url("grafik09.jpg");}
nav a {
    display: flex;
    text-decoration: none;
    height:inherit;
    align-items: center;
    justify-content: center;
    color:#000;
    padding:10px;
    }
   
nav a:focus, nav a:hover, nav a:focus, nav a:hover {
    background-color:#0069b4;
    color:#FFFFFF;
    width:100%;
    padding:10px;
    }
</style>
</head>
<body>
<div class="container">
<div class="grid-container">
  <nav>
  <div class="grid_3x3">
    <div class="block"><div class="img grafik01"><a href="#">Lorem ipsum dolor sit amet.</a></div></div>
    <div class="block"><div class="img grafik02"><a href="#">Consetetur sadipscing elitr.</a></div></div>
    <div class="block"><div class="img grafik03"><a href="#">Sed diam nonumy eirmod tempor invidunt ut</a></div></div>
    <div class="block"><div class="img grafik04"><a href="#">Consetetur sadipscing elitr.</a></div></div>
    <div class="block"><div class="img grafik05"><h2>Sed diam nonumy eirmod tempor invidunt ut.</h2></div></div>
    <div class="block"><div class="img grafik06"><a href="#">Lorem ipsum dolor sit amet.</a></div></div>
    <div class="block"><div class="img grafik07"><a href="#">Sed diam nonumy eirmod tempor invidunt ut.</a></div></div>
    <div class="block"><div class="img grafik08"><a href="#">Lorem ipsum dolor sit amet.</a></div></div>
    <div class="block"><div class="img grafik09"><a href="#">Consetetur sadipscing elitr.</a></div></div>    
</div>
</nav>
</div>
</div>
</body>
</html>
	nav {
    height:100%;
    }
nav a {
    display: flex;
    text-decoration: none;
    color:transparent !important;
    /*visibility:hidden;*/
    height:inherit;
    align-items: center;
    justify-content: center;
    color:#000;
    padding:10px;
    }
    
nav a:focus, nav a:hover, nav a:focus, nav a:hover { 
    background-color:#0069b4;
    /*visibility:visible !important;*/
    color:#FFFFFF !important;
    width:100%;
    padding:10px;
    }
	for (var i = 0; i < thelinks.length; i++) {