*{
    margin: 0;
    padding: 0;
}
body{
    overflow: hidden;
    animation: shakebody linear 3s infinite;
}
.sky{
    height: 100vh;
    width: 100%;
    background-image: url(background.jpg);
    position: absolute;
    background-repeat: no-repeat;
}
.trees{
   height: 100vh;
   width: 100%;
   background-image: url(trees.png);
   background-size: cover;
   position: absolute;
}
.track{
    height: 60vh;
    width: 800vw;
    background-image: url(track.png);
    position: absolute;
    background-repeat:repeat-x;
    top: 87vh;
    animation: carmove linear 11s infinite;
}
.car{
  height: 100px;
  width: 380px;
  background-image: url(car_body.png);
  background-size: cover;
  background-repeat: no-repeat;
  position:absolute;
  left: 444px;
  bottom: 60px;
  animation: som linear 3s infinite;
}
.wheel_left img{
  width: 77px;
  position: relative;
  top: 40px;
  left: 43px;
  animation: wheelRotation linear .6s infinite;
}
.wheel_right img{
    width: 77px;
    position: relative;
    top: -39px;
    left: 235px;
    animation: wheelRotation linear .6s infinite;
  }
  @keyframes wheelRotation
  {
    100%{
        transform: rotate(360deg);
    }   
  }
  @keyframes carmove
  {
    100%{
        transform: translatex(-500vw);
    }   
  }
  @keyframes som
  {
    0%{
        transform: translatey(-5px);
    }   
    15%{
        transform: translatey(5px);
    }   
    100%{
        transform: translatey(-5px);
    }   
  }
  @keyframes shakebody
  {
    0%{
        transform: translatey(-5px);
    }   
    15%{
        transform: translatey(5px);
    }   
    100%{
        transform: translatey(-5px);
    }   
  }