.arrow-up {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 15px 20px 15px;
  border-color: transparent transparent green transparent;
}

.arrow-down {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 20px 15px 0 15px;
  border-color: red transparent transparent transparent;
}

Add style for the arrow indicating
Add style for the arrow indicating
