.one {
    float: left;
    margin: 1em;
    color: #fff;
}

.two {
    margin-top: 20px;
    margin-right: 10%;
    margin-bottom: 20px;
    margin-left: 10%;
}

.three {
    margin-top: 20px;
    margin-right: 10%;
    margin-bottom: 1em;
    margin-left: 10%;
}

.four {
    margin-top: 20px;
    margin-bottom: 10%;
    margin-left: 1em;
}

.four-equals {
    margin: 1em;
}