body{
    text-align: center;
}

.btn{
    height: 200px;
    width: 200px;
    border: 5px solid black;
    border-radius: 15%;
    margin: 1rem;
}

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

.red{
    background-color: rgb(216 52 52 / 85%);
}

.yellow{
    background-color: #ffff00cf;
}

.green{
    background-color: #3cd23c;
}

.purple{
    background-color: #de1bdebd;
}

.flash{
    background-color: white;
}

.userflash{
    background-color: aqua;
}

h3{
    text-align: end;
}