flexbox_practice.css

*{
    margin: 0px;
}

.parent{
    width: 100%;
    height: 600px;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    background-color: grey;
}
.child{
    height: 200px;
    width: 15%;
    background-color: red;
}