code: def normal_h1(size: int = 10000, mean: float = 0, sigma: float = 1) -> Histogram1D:
      
      data = np.random.normal(mean, sigma, (size,))
      return h1(data, name="normal", axis_name="x", title="1D normal distribution")
docs: A simple 1D histogram with normal distribution.
  
      Parameters
      ----------
      size : Number of points
      mean : Mean of the distribution
      sigma : Sigma of the distribution