* {
    margin: 0;
    padding: 0;
}

body {
    overflow: hidden;
    animation: shakebody linear 6s infinite;
}

.sky {
    height: 100vh;
    width: 100%;
    background-image: url(asset/background.jpg);
    background-repeat: repeat-x;
    position: absolute;
}

.trees {
    height: 100vh;
    width: 100%;
    background-image: url(asset/trees.png);
    background-size: cover;
    position: absolute;
    top: -144px;
}

.track {
    height: 60vh;
    width: 1000vw;
    background-image: url(asset/track.png);
    background-repeat: repeat-x;
    position: absolute;
    top: 70vh;
    animation: carMove linear 13s infinite;

}

.car {
    height: 100px;
    width: 380px;
    background-image: url(asset/car_body.png);
    background-size: cover;
    background-repeat: no-repeat;
    position: absolute;
    left: 444px;
    bottom: 30vh;
    animation: shake linear .3s infinite;

}


.wheel1 img {
    width: 77px;
    position: relative;
    top: 42px;
    left: 42px;
    animation: wheelRotation linear .16s infinite;
}


.wheel2 img {
    width: 77px;
    position: relative;
    top: -39px;
    left: 235px;
    animation: wheelRotation linear .16s 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);
    }
}

@keyframes shakebody {
    0% {
        transform: translateY(-50px);
    }

    50% {
        transform: translateY(0px);
    }

    100% {
        transform: translateY(-50px);
    }
}

@media (max-width:768px) {
    .sky {
        height: 100vh;
        width: 400%;
    }

    .trees {
        top: -150px;
    }

}

@media (min-width:1500px) {
    .sky {
        height: 100vh;
        width: 400%;
    }

    .trees {
        top: -150px;
    }

}

@media (min-width:768px) and (max-width:1279px) {
    .sky {
        height: 100vh;
        width: 400%;
    }

}