#imagBack{
    content: ' '; 
    position: fixed; 
    top: -50px; 
    bottom: 0; 
    left: 0px;
    width: 100%;
    z-index: -1;
    background: url(BackGround.png) no-repeat; 
}
body{
    background-color: gray;
}
#Ground{
    top: 400px;
    left: 50px;
    display: flex;
    position: relative;
    background-color: gray;
    width: 50px;
    height: 50px;
    background-color: brown;
    
}
#GroundTwo{
    top: 100px;
    left: 400px;
    display: flex;
    position: relative;
    background-color: gray;
    width: 50px;
    height: 50px;
    background-color: brown;
    
}
#myShape{
    top: 400px;
    left: 50px;
    display: flex;
    position: relative;
    background-color: gray;
    width: 50px;
    height: 50px;
    animation: Bounce 3.14s linear 0s infinite ;
}
@keyframes Bounce {
    0% {
        background-color: lime;
        transform: translate(0,0);
    }
    10% {
        background-color: green;
        transform: translate(0,0);
    }
    35% {
        background-color: lime;
        transform: translate(100px,-200px);
    }
    50% {
        background-color: green;
        transform: translate(160px,-140px);
    }
    70%{
        background-color: lime;
        transform: translate(290px,-310px);
    }
    80%{
        background-color: green;
        transform: translate(350px,-250px);
    }
    100%{
        background-color: lime;
        transform: translate(350px,-250px);
    }
}