textarea {
  width: 32%;
  float: top;
  min-height: 250px;
  overflow: scroll;
  margin: auto;
  display: inline-block;
  background: #f4f4f9;
  outline: none;
  font-family: Courier, sans-serif;
  font-size: 14px;
}

iframe {
  bottom: 0;
  position: relative;
  width: 100%;
  height: 35em;
}

.w-33{
  display: inline-block;
  width: 33.10%;
}


@media only screen and (max-width : 600px) {
  .w-33{
    display: block;
    width: 94%;
    margin: 3%;
  }
}