body {
  color: white;
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

#resizeBtn {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 100px;
  border: 0;
}

#container {

  width: 960px;
  height: 960px;
  display: flex;
  flex-wrap: wrap;
  border: 2px solid rgb(0, 0, 0);
}

.square {
  box-sizing: border-box;
}