def METHOD_NAME():
    observations = ""
    index_list = np.array(range(2000))
    index_list = [index_list[i : i + 4] for i in range(0, len(index_list), 4)]
    for nr, (i1, i2, i3, i4) in enumerate(index_list):
        observations += f"""
    \nGENERAL_OBSERVATION CUSTOM_DIFF_{nr}