.arrow {
    position: absolute;
    top: 0;
    left: 0;
}
.arrow .arrow-line {
    position: absolute;
    top: 10px;
    height: 10px;
    display: flex;
}
.arrow .arrow-line .arrow-line-block {
    width: 15px;
    height: 10px;
    margin-right: 5px;
}
.arrow .arrow-head {
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    box-sizing: border-box;
    border-style: solid;
    border-top-width: 15px;
    border-top-color: transparent;
    border-left-width: 20px;
    border-right-width: 0;
    border-bottom-width: 15px;
    border-bottom-color: transparent;
}