<head>
<style>
body {
background-color: black;
}
@media all and (min-width:600px)
{
body { background-color: green }
}
</style>
</head>
<body>
<head>
<style>
body {
background-color: black;
}
@media all and (min-width:600px)
{
body { background-color: green }
}
</style>
</head>
<body>