body{
    text-align:center;
    
}
button{
    height:10rem;
    width:10rem;
    border:6px solid black;
    border-radius:20%;
    margin:0.5rem;
}
.container{
    display: flex;
    justify-content: center;
    flex-direction:column;
    
}
.red{
    background-color: red;
}
.green{
    background-color:green;
}
.yellow{
    background-color:yellow;
}
.blue{
    background-color: blue;
}
.flash{
    background-color:white;
}
.userFlash{
    background-color:rgb(142, 239, 142);
}