body{
    text-align: center;
}

.btn {
    height: 200px;
    width: 200px;
    border-radius: 20%;
    border: 10px solid black;
    margin: 2rem;
}

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

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

.purple {
    background-color: #ce48d3;
}
.green {
    background-color: #38b156;
}

.flash {
    background-color: white;
}
.userflash {
    background-color: green;
}