index.html

    function endGen() {
      let totalFitness = 0
      bestOfGen = 0

      // Calculate total fitness and find highest performing car
      cars.forEach((car, ind) => {
        car.dead = true
        totalFitness += car.fitness
        if(car.fitness > bestOfGen) {bestOfGen = car.fitness}
      })
      //Update highest score if applicable
      if(bestOfGen > topFitnessScore) {
        topFitnessScore = bestOfGen
      }

      return totalFitness
    }