body{
    text-align: center;
}

.btn{
    height:200px;
    width:200px;
    border-radius: 20%;
    border:10px solid black;
    margin:1.5rem;
}

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

.c1{
    background-color: #FF598B;
}

.c2{
    background-color: #73FFAD;
}

.c3{
    background-color: #FFF280;
}

.c4{
    background-color: #54F9FF;
}

.flash{
    background-color: white;
}

.user-flash{
    background-color: green;
}