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;
}

.red {
    background-color: red;
}

.yellow {
    background-color: rgb(7, 128, 132);
}

.green {
    background-color: green;
}

.purple {
    background-color: rgb(200, 26, 200);
}

.flash {
    background-color: white;
}

.userflash {
    background-color: rgb(166, 255, 13);
}