gistfile1.js

var movieConfig = {
    width: 550,
    height: 400,
    plugins: [
      '//cdn.pixelplant.com/as3shim-latest.min.js',
      '//cdn.pixelplant.com/as3vm-latest.min.js',
      '//cdn.pixelplant.com/transwf-runtime-latest.min.js'
    ],
    pluginDebug: false,
    urls: ['movie.js'],
    assetBaseUrl: 'assets',
    flashConfig: {flashVars: {varName:'and da value :)'}} // <<<<<==== flash vars
  };
  bonsai
    .setup({runnerContext: bonsai.IframeRunnerContext})
    .run(document.getElementById('bs-stage'), movieConfig);