body{
    text-align: center;
}
.btn{
    height: 200px;
    width: 200px;
    border:10px solid black;
    border-radius: 20%;
    margin: 2.5rem;
    cursor: pointer;
}
.btn-container{
    display: flex;
    justify-content: center;
}
.red{
    background-color: red;
}
.yellow{
    background-color: yellow;
}
.green{
    background-color: green;
}
.purple{
    background-color: purple;
}
.flash{
    background-color: aliceblue;
}
.userflash{
    background-color: aqua;
}
#highscore{
    font-family: 'Times New Roman', Times, serif;
}