body {
    background: rgb(212, 211, 211);
}      
.grid {
    width: 200px;
    height: 200px;
    border: 1px solid rgb(0, 17, 255);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}
.grid div {
    width: 20px;
    height: 20px;
}
.snake {
    background: rgb(24, 175, 62);
}
.apple {
    background: rgb(240, 32, 32);
    border-radius: 20px;
}
.popup {
    background: rgb(32, 31, 31);
    width: 100px;
    height: 100px;
    position: fixed;
    top: 100px;
    left: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
}