Как добавить эти верхние штуки

.element {
  width: 200px;
  height: 100px;
  background-color: green;
  border-radius: 15px;
  position: relative;
  margin-top: 50px;
}
.element:before, .element:after {
  content: '';
  display: block;
  position: absolute;
}
.element:before {
  bottom: 100%;
  left: calc(50% - 20px);
  border: 20px solid transparent;
  border-bottom: 20px solid green;
  z-index: 10;
}
.element:after {
  top: -30px;
  left: calc(50% - 15px);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: lightblue;
  z-index: 5;
}

<div class="element">

</div>