body{
    text-align: center;
}
.btn{
    height:200px;
    width: 200px;
    border-radius: 20%;
    border: 10px solid black;
    margin:2.5rem;
}

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

.yellow {
  background-color: #f99b45;
}

.red {
  background-color: #d95980;
}

.purple {
  background-color: purple;
}

.green {
  background-color: #63aac0;
}

.flash{
  background-color: white;
}

.userflash{
  background-color: green;
}