body
{        
    font-size:14px;
}
header
{        
    border: 1px solid black;        
	font-size:18px;        
	padding: 8px;
}
nav
{        
     margin-top: 10px;        
	 overflow: hidden;
}
section
{        
     margin: 10px;
}
div
{        
     padding: 10px;        
	 margin-bottom: 10px;
}
#myid
{        
     color: red;
}
.square
{               
     background-color: green;       
	 padding: 10px;        
	 color: white;        
	 width: 100px;        
	 float: left;        
	 margin-bottom: 0px;
}
.square:nth-child(2)
{               
      background-color: yellow;        
	  color: black;
}
footer
{        
       border: 1px solid black;
	   font-size: 18px;        
	   padding: 8px;
}