body {
  text-align: center;
}
.btn {
  width: 200px;
  height: 200px;
  border-radius: 20%;
  border: 10px solid black;
  margin: 3rem;
}
.btn-container {
  display: flex;
  justify-content: center;
}
.red {
  background-color: #d95980;
}
.yellow {
  background-color: #f99b45;
}
.green {
  background-color: #63aac0;
}
.purple {
  background-color: #9b59b6;
}
.flash {
  background-color: white;
}
.userflash {
  background-color: rgb(157, 240, 157);
}