.arrow-up {
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;

    border-bottom: 5px solid black;
}

.arrow-down {
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;

    border-top: 20px solid #f00;
}

.arrow-right {
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 8px solid #08266C;
    display: inline;
    position: absolute;
    left: 90%;
    bottom: 30%;
    z-index: 10;
}

.arrow-left {
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;

    border-right: 10px solid blue;
}