body{
  text-align: center;
}
.btn{
  height: 200px;
  width: 200px;
  border:10px solid black;
  border-radius: 20%;
  margin: 1rem;
}
.btn-container{
  display: flex;
  justify-content: center;
}
.green{
  background-color: green;
}
.yellow{
  background-color: yellow;
}
.red{
  background-color: red;
}
.blue{
  background-color: rgb(0, 128, 255);
}
.flash{
  background-color: white;
}
.userFlash{
  background-color: rgb(97, 113, 97);
}