text: import numpy as np
  import pandas as pd
  
  np.random.seed(54)
  
  df = pd.DataFrame(
      {
          "date": pd.date_range(start="2021-01-01", end="2021-07-01", freq="D"),
          "var1": np.random.randint(low=100, high=500, size=182),
          "var2": np.random.randint(low=100, high=500, size=182),
      }
  )
  
  df.to_csv("data/illustration.csv", index=False)
  