body{
    text-align: center;
}
.btn{
    height:200px;
    width:200px;
    border-radius:20%;
    border: 6px solid black;
    margin: 2rem
}
.btn-container{
    display:flex;
    justify-content: center;
}
.red{
    background-color: red;
}
.yellow{
    background-color: yellow;

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