body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.flag {
    /* border: 1px solid brown; */
    height: 125px;
    width: 125px;
    background-color: #ff0000;
    position: relative;
}

.cross {
    /* border: 1px solid green; */
    background-color: #ffffff;
    position: absolute;
}

.cross.horizontal {
    /* border: 2px solid gold; */
    height: 23px;
    width: 78px;
    left: 23px;
    top: 50px;
}

.cross.vertical {
    /* border: 1px solid black; */
    height: 78px;
    width: 23px;
    left: 50px;
    top: 23px;
}