canvas {
    border: 1px solid #000;
    width: 300px;
    height: 150px;
    margin-top: 5px;
}

background-container {
    background-color: #fff;
}
padding-top {
    padding-top: 10px;
}
width-30 {
    width: 30px;
}
display-none {
    display: none
}

padding-bottom {
    padding-bottom: 20px;
}