.grid {
    position: absolute;
    width: 600px;
    height: 100%;
    background-color: black;
}
.ball {
    position: absolute;
    width: 15px;
    height: 15px;
    border-radius: 100px;
    background-color: white;
}
* {
    margin: 0;
    box-sizing: border-box;
}

#fps{
    color: rgb(255, 243, 21);
    font-size: 50px;
}