.grid {
  margin: auto;
  width: 400px;
  height: 600px;
  background-color: yellow;
  display: grid;
  position: relative;
}
.doodler {
  width: 60px;
  height: 85px;
  background-color: red;
  position: absolute;
}
.platform {
  width: 85px;
  height: 15px;
  background-color: green;
  position: absolute;
}