h1
{
	text-align: center;
}

h3
{
		text-align: right;
}	
h4
{
		font-size: small;
		text-align: center;
}
{
	color: brown;
}
h1 .introduction
{
	color: red;
}
.directo
{
	color: green;
}
body
{
	background-color: black;
	color: white;
}