anchor.diff:      if (cd.lib.hasPrediction(light) && colour != 'pulling' && colour != 'faulty') {
         const isRight = (colour === light.predicted);
         const name = isRight ? 'tick' : 'cross';
  -      const $count = setPredict(name, counts[name] += 1);
  +      const $count = setPredict(name, counts[name] + 1);
         removeRagBackground();
         if (!isRight) {
           $count.addClass(light.predicted);
  
positive.code:   cd.review.predictCounts = {};
  
    cd.review.predictCounts.reset = () => {
      Object.keys(counts).forEach(key => counts[key] = 0);
      removeRagBackground();
      setPredict('cross', 0);
      setPredict('tick', 0);
      updateTotal();
    };
  
  
negative.code:     $('.count', $predictCounts).removeClass('red amber green');
    };
  
    const setPredict = (name, n) => {
      const $count = $(`.${name}.count`, $predictCounts);
      $count.text(counts[name] = n);
      return $count;
    };
  
  