Scale-Free Network (Barabási-Albert)

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    {"data":{"id":"h2","label":"hub2","deg":6}},
    {"data":{"id":"a"},"data":{"id":"a"}},
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    {"data":{"id":"n4"}},{"data":{"id":"n5"}},{"data":{"id":"n6"}},
    {"data":{"id":"n7"}},{"data":{"id":"n8"}},{"data":{"id":"n9"}},
    {"data":{"id":"n10"}},{"data":{"id":"n11"}},{"data":{"id":"n12"}},

    {"data":{"source":"h1","target":"n1"}},{"data":{"source":"h1","target":"n2"}},
    {"data":{"source":"h1","target":"n3"}},{"data":{"source":"h1","target":"n4"}},
    {"data":{"source":"h1","target":"n5"}},{"data":{"source":"h1","target":"h2"}},
    {"data":{"source":"h2","target":"n6"}},{"data":{"source":"h2","target":"n7"}},
    {"data":{"source":"h2","target":"n8"}},{"data":{"source":"h2","target":"n9"}},
    {"data":{"source":"n1","target":"n10"}},
    {"data":{"source":"n4","target":"n11"}},
    {"data":{"source":"n7","target":"n12"}}
  ],
  "layout":{"name":"cose","animate":false},
  "style":[
    {"selector":"node","style":{"background-color":"#3666ff","width":28,"height":28}},
    {"selector":"node[id='h1']","style":{"background-color":"#dc2626","width":70,"height":70,"label":"hub1","color":"white","text-valign":"center"}},
    {"selector":"node[id='h2']","style":{"background-color":"#f59e0b","width":58,"height":58,"label":"hub2","color":"white","text-valign":"center"}},
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