def fade_copies_right(s):
    """ Returns the string made by concatenating `s` with it's right slices of 
    decreasing sizes.

    Parameters
    ----------
    s : string
        String to be repeated and added together.

    Returns
    -------
    output : string
        String after it has had ever decreasing slices added to it.
    """

    # Initialisations
    s_list = list(s)
    output_list = [ ]
    
    for i in range(len(s)):
        output_list += s_list
        s_list = s_list[1:]
        
    output = "".join(output_list)
    
    return output