.pot-box {
    width: 100%;
    position: absolute;
    bottom: 0;
    height: 90%;
    z-index: 1;
    overflow: hidden; 
}
.pot-box .waves {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: -10%; 
}
.pot-box .waves canvas{
    display: block;
}