.wrapper {
  margin: 20px auto 0px auto;
  padding: 40px;
  border: 1px solid black;
  height: 620px;
  width: 700px;
  background-color: gray;
}

.control-panel > button {
  margin: 10px 5px 10px 5px;
}

.sliders {
  width: 300px;
  margin-right: auto;
  margin-left: auto;
}

td {
  height: 10px;
  width: 10px;
}

.open {
  background-color: paleturquoise;
}

.typeOne {
  background-color: black;
}

.typeTwo {
  background-color: green;
}