.pagewrapper {
    max-width: 600px;
    margin: 0 auto;
}
h1 {
    font-size: 48px;
    font-weight: bold;
    text-align: center;
    margin: 25px;
}
h4 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
}
.parent {
    background-color: #ccc;
    display: flex;
    margin-bottom: 25px;
}
.child {
    width: 100px;
    padding: 10px;
    color: #fff;
    box-sizing: border-box;
    font-size: 42px;
}
.red {
    background-color: red;
}
.green {
    background-color: green;
}
.blue {
    background-color: blue;
}
.orange {
    background-color: orange;
}
.one {
    justify-content: flex-start;
}
.two {
    justify-content: flex-end;
}
.three {
    justify-content: center;
}
.four {
    justify-content: space-between;
}
.five {
    justify-content: space-around;
}
.six {
    align-items: flex-start;
}
.seven {
    align-items: flex-end;
}
.eight {
    align-items: center;
}
.nine {
    flex-wrap: wrap;
}
.nine .child {
    width: 200px;
}
.ten {
    align-items: flex-start;
}
.ten .orange {
    align-self: flex-end;
}
.eleven .red {
    order: 4;
}
.eleven .green {
    order: 2;
}
.eleven .blue {
    order: 3;
}
.eleven .orange {
    order: 1;
}
.twelve .red {
    flex: 1;
}
.twelve .orange {
    flex: 1;
}
.six,
.seven,
.eight,
.ten {
    height: 100px;
}