text: var walk = fc.data.random.walk()
    .period(2)   // Projection period, by default = 1
    .steps(30)   // Number of steps to take, by default = 20
    .mu(0.3)     // Drift component, by default = 0.1
    .sigma(0.2); // Volatility, by default = 0.1
  
  // generate some data!
  var data = walk(100); // The series starts at 100
  
  d3.select('#walk')
    .text(JSON.stringify(data, null, 2));
  