<!DOCTYPE html>
<html>
<head>
<style>
html {
background-color: #ccc;
font-size: 50px;
}
.frame {
text-align: center;
}
.left {
float: left;
}
.narrow {
width: 300px;
margin: 10px;
}
.wide {
width: 600px;
}
.short {
height: 360px;
}
.tall {
height: 800px;
}
iframe {
width: 300px;
border: solid 1px black;
display: block;
background-color: white;
}
.wide iframe {
width: 600px;
}
.tall iframe {
height: 660px;
}
.short iframe {
height: 300px;
}
</style>
</head>
<body>
<div class="left">
<div class="frame short narrow">
<iframe id="frametwo" sandbox="allow-scripts" src="summit-two.html">
</iframe>
frame one
</div>
</div>
<div class="left">
<div class="frame short narrow">
<iframe id="framethree" sandbox="allow-scripts" src="summit-three.html">
</iframe>
frame two
</div>
</div>
</body>
</html>