canvas {
  margin-left: 300px;
    border:1px solid #d3d3d3;
    background-image: url("https://i.imgur.com/rdgmZTo.gif?noredirect");
    background-repeat: no-repeat;
    background-size: 1000px;
}
#HighScore {
  margin-top: 150px;
}
@keyframes bgcolor {
    0% {
        background-color: lightblue
    }

    20% {
        background-color: aqua
    }

    40% {
        background-color: greenyellow
    }

    50% {
        background-color: yellow
    }

    60% {
        background-color: orange
    }

    80% {
        background-color: red
    }

    100% {
        background-color: purple
    }
}
body {
    animation: bgcolor 5s infinite;
}