body{
    text-align: center;
}

.btn{
    height: 200px;
    width: 200px;
    border-radius: 10px;
    border: 5px solid black;
    margin: 10px;
}

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

.red{
    background-color: red;
}

.yellow{
    background-color: yellow;
}

.green{
    background-color: rgb(44, 226, 44);
}

.blue{
    background-color: blue;
}

.flash{
    background-color: white;
}

.userflash{
    background-color: rgb(11, 158, 11);
}