body{
    text-align: center;
}

.btn{
    height: 150px;
    width: 150px;
    border-radius: 20%;
    border: 8px solid black;
    margin: 1rem;
}
.btn-container{
    display:flex;
    justify-content: center;
}
.red{
    background-color: #d95980;
}
.yellow{
    background-color: #ce9f1f;
}
.green{
    background-color: #63aa60;
}
.blue{
    background-color: #819ff9;
}
.flash{
    background-color:white;
}
.userflash{
    background-color: white;
}