function createAssemblyLine() {
     return {
         hasClima(car) {
             car.temp = 21;
             car.tempSettings = 21;
             car.adjustTemp = () => {
                 if (car.temp < car.tempSettings) {
                     car.temp++;
                 } else if (car.temp > car.tempSettings){
                     car.temp--;
                 }
             }
         },

         hasAudio(car) {
             car.currentTrack = {
                 'name': '',
                 'artist': '',
             };
             car.nowPlaying = () => {
                 if (car.currentTrack !== null) {
                     console.log(`Now playing '${car.currentTrack.name}' by ${car.currentTrack.artist}`);
                 }
             }
         },

         hasParktronic(car) {
             car.checkDistance = (distance) => {
                 if (distance < 0.1) {
                 console.log('Beep! Beep! Beep!');
                 } else if (distance < 0.25) {
                 console.log('Beep! Beep!');
                 } else if (distance < 0.5) {
                 console.log('Beep!');
                 } else {
                 console.log('');
                 }
             }
         }
     }
 }