Half Note With Four Flags?

A quarter note, the first one appearing in the image below,
could probably be called the most basic note duration.

In time signatures 2/4, 3/4, 4/4, etc., the 4 on bottom
means that a quarter note lasts for one single beat.

To double the duration, remove the "filling" in the notehead.
To double it again and make it four beats, remove the stem.

Adding a flag to a quarter note cuts the duration in half.
Therefore, the basic note with two flags is a fourth of a beat.

Now, the question is, if you hollow out the one-beat note,
and then add four flags, what is the duration of the result?

The answer is, "A lot of what glitters is not real."
It's just for decoration. Kinda glamourous, ya know?

~ FURTHER READING ~

On opposite sides of the Pond, we use different names
for the durations. Here is a side-by-side comparison.

United States	United Kingdom
double whole note	breve
whole note	semibreve
half note	minim
quarter note	crochet
eighth note	quaver
sixteenth note	semiquaver
thirty-second note	demisemiquaver
sixty-fourth note	hemidemisemiquaver
et	cetera