body {
    margin: 0;
    padding: 0;
    color: whitesmoke;
    background-color: black;
    text-align: center;
}

h1 {
    font-size: 45px;
    text-decoration: underline;
    color: aquamarine;
}

h3 {
    position: relative;
    position: fixed;
    left: 900px;
    top: 500;
    font-size: 30px;
}

.btn {
    height: 150px;
    width: 150px;
    border-radius: 30px;
    border: 5px solid rgb(175, 247, 245);
    margin: 12px;
}

.green {
    background-color: rgb(21, 181, 21);
}

.red {
    background-color: rgb(252, 62, 62);
}

.yellow {
    background-color: rgb(243, 243, 29);
}

.blue {
    background-color: rgb(85, 85, 247);
}

.line1,
.line2 {
    display: flex;
    justify-content: center;
}

.flash {
    background-color: whitesmoke;
}

.userFlash {
    background-color: rgb(217, 180, 251);
}


#back {
    height: 20px;
    width: 180px;
    border: 2px solid palegreen;
    background-color: aqua;
    padding: 6px;
    border-radius: 20px;
    position: relative;
    position: fixed;
    bottom: 20px;
    left: 10px;

}

a {
    text-decoration: none;
    font-weight: bold;
}