body {background: darkslategrey;
margin: 0;
padding: 0;
height:100%;
width: 195vh;
overflow-x: hidden;
}

#con {background-color: seagreen;
color: white;
display: grid;
gap: 3px;
grid: repeat(6, 1fr) / repeat(6, 1fr) ;
height: 100%;
width: 155vh;
}

#con > div {background: orange;
}