.grid {
  position: absolute;
  left: 670px;
  width: 560px;
  height: 300px;
  border: solid black 3px;
}

.block {
  position: absolute;
  width: 100px;
  height: 20px;
  background-color: palevioletred;
}

.user {
  position: absolute;
  width: 100px;
  height: 20px;
  background-color: rgb(123, 1, 1);
}

.ball {
  position: absolute;
  width:  20px;
  height:  20px;
  border-radius: 10px;
  background-color: rgb(0, 0, 0);
}

.btn {
  margin-bottom: 10px;
}

.btn a {
  text-decoration: none;
}