D3 Examples - Film Flowers, Single Starter

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.13.1/lodash.js'></script>
  <link href='https://fonts.googleapis.com/css?family=Libre+Baskerville:400,700' rel='stylesheet' type='text/css'>
  
  <style>
    svg {
      width: 600px;
      height: 20000px;
    }
  </style>
</head>
​
<body>
  <svg></svg>
  
  <script>
    const width = 600;
    const height = 600;
    
    const petalPaths = [[
        'M0,0',
      'C50,40 50,70 20,100',
      'L0,85',
      'L-20,100',
      'C-50,70 -50,40 0,0'
    ],
        // ADD 3 MORE PETAL PATHS
    [
        // write your svg path here
        'M0,0',
        'C0,50 -50,50 -50,100',
        'C-50,120 -35,120 -20,110',
        'C-10,100 10,100 20,110',
        'C 35,120 50,120 50,100',
        'C 50,50 0,50 0,0'
      ]
    ];
    
    // petal lookup for PG ratings
    const pathLookup = {
      G: petalPaths[0],
      PG: petalPaths[1],
      'PG-13': petalPaths[2],
      R: petalPaths[3],
    };
    
    // grab svg
    const svg = d3.select(' svg');
    
    /*****************************************************
    ** get movie data
    ******************************************************/
    
    d3.json('movies.json', function(movies) {
      movies = _.map(movies, movie => {
        return {
          rating: ++movie.imdbRating,
          votes: parseInt(movie.imdbVotes.replace(/\,/g, '')),
          year: ++movie.Year,
          title: movie.Title,
          pg: movie.Rated,
        }
      });
      
      const votesDomain = d3.extent(movies, data => data.votes);
      
      const petalsNum = d3.scaleQuantize()
        .domain(votesDomain)
        .range([5, 15]);
      
      // 1. create petal data for just the first movie
      const movie = movies.filter((movie, index) => index === 0);
      
      const petalData = [];
      
      for (let i = 0; i < petalsNum(movie.votes); i++) {
        petalData.push({
          rotate: i/petalsNum(movie.votes)*360,
          path: pathLookup[movies[0].pg]
        });
      }     
      
      
      // 2. draw the petals using d3's data-binding and enter-append
      // (hint: use SVG transform for translation, rotation, and scale)
      svg.selectAll('path')
       .data(petalData)
       .enter().append('path')
       .attr('transform', data => `translate(200,200) rotate(${data.rotate})`)
       .attr('d', data => data.path)      
       .attr('fill', 'lime')
       .attr('stroke', '#000')
       .attr('style', 'opacity:0.5;');
      
    });
    
  </script>
</body>
​
    