Exercise 2.4: Keyframe Animation

here is the relevant css

#car { animation-name: drivingAround; animation-duration: 10s;
            animation-iteration-count: infinite; animation-fill-mode: both; }
            @keyframes drivingAround { 0% { transform: translateX(-100px); } 50%
            { transform: translateX(600px); } 100% { transform:
            translateX(-100px); } }