def proc_string(proc_steps):
    """ Creates processign step string from the processing steps Boolean
    array.

    Args:
        proc_steps (list): list of 5 Boolean terms for desired processing
        steps

    Returns:
        proc_ext (str): string of 5 1's or 0's corresponding to the True
        or False in the Boolean list
    """
    # Create Processing Steps Extension
    proc_ext = ""
    for ind, step in enumerate(proc_steps):
        if step is True:
            proc_ext = proc_ext + "1"
        else:
            proc_ext = proc_ext + "0"

    return proc_ext