rectangle arrow

by Uriel Zarnihchi

HTML

<div class="arrow-down">
    <div class="arrow-up">

CSS

.arrow-down {
width: 0px;
height: 0px;
border-left: 20px solid transparent;
border-right: 20px solid transparent;
border-top: 20px solid #f00;
    

}

.arrow-up {
width: 0px;
height: 0px;
border-left: 20px solid transparent;
border-right: 20px solid transparent;
border-bottom: 20px solid #f00;
    

}