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;
}

.cyan {
    background-color: #00FFFF;
}

.purple {
    background-color: #9C27B0;
}

.orange {
    background-color: #FF9800;
}

.lime {
    background-color: #039558;
}

.flash {
    background-color: white;
}

.userFlash {
    background-color: black;
}