*{
    margin: 0;
    padding: 0;
}
body{
    overflow: hidden;
}
.sky{
    height: 100vh;
    width: 100%;
    background-image: url(./images/background.jpg);
    position: absolute;
    background-repeat: no-repeat;
}
.trees{
    height: 100vh;
    width: 100%;
    background-image: url(./images/trees.png);
    background-size: cover;
    position: absolute;
    bottom: 20vh;
}
.track{
    height: 60vh;
    width: 800vw;
    background-image: url(./images/track.png);
    background-repeat: repeat-x;
    position: absolute;
    top: 80vh;
    animation: carmove linear 12s infinite;
}
.car{
    height: 100px;
    width: 380px;
    background-image: url(./images/car_body.png);
    background-size: cover;
    background-repeat: no-repeat;
    position: absolute;
    left: 444px;
    bottom: 70px;
    animation: shake 4s linear infinite;
}
.wheel1 img{
width: 70px;
position: relative;
top: 41px;
left: 46px;
animation: wheelrotation linear .6s infinite;
}
.wheel2 img{
    width: 77px;
    position: relative;
    top: -34px;
    left: 235px;
    animation: wheelrotation linear .6s infinite;
}
@keyframes wheelrotation {
    100%{
        transform: rotate(360deg);
    }
}
@keyframes carmove {
    100%{
        transform:translateX(-500vw);
    }
}
@keyframes shake {
    0%{
        transform:translateY(-5px);
    }
    50%{
        transform:translateY(5px);
    }
    100%{
        transform:translateY(-5px);
    }

}