body{
  text-align: center;
}

.btn{
  height: 200px;
  width: 200px;
  border: 10px solid black;
  border-radius: 20%;
  margin: 1.5rem;
  cursor: pointer;
}

.btn-container{
  display: flex;
  justify-content: center;
}

.yellow{
  background-color: #f99b45;
}
.red{
  background-color: #d95980;
}

.green{
  background-color: #63aac0;

}
.purple{
  background-color: #819ff9;
}

.flash{
  background-color: white;
}

.userFlash{
  background-color: green;
  
}