html{
    width: 100%;
    height: 100%;
}
body{
    margin: 0;
    padding: 0;
    background:  rgba(0, 0, 0, 0) linear-gradient(rgb(56, 56, 56), rgb(122, 122, 122)) repeat scroll 0% 0%;
}
#canvas{
    width: 100%;
    height: 100%;
}