h1 {
    color: brown;
    font-style: italic;
}

h2 {
    color: orange;
}

p {
    color: purple;
    text-align: center;
}

#square {
    width: 120px;
    height: 120px;
    background: red;
}

#triangle {
    width: 0;
    height: 0;
    border-bottom: 120px solid green;
    border-left: 60px solid transparent;
    border-right: 60px solid transparent;
}