Create a logo

[php1ic]

This module is starting to resemble a proper package, and a proper package should have a logo.

[php1ic]

Replicate the look of the Segre chart and create an isotopic chain. In ASCII art it would be

+---+---+----+---+----+---+----+----+---+
| N | U | Cl | E | Ar | M | As | Se | S |
+---+---+----+---+----+---+----+----+---+

Only fake element is for "E"
N - Nitrogen
U - Uranium
Cl - Chlorine
E - ?
Ar - Argon
M - Molybdenum
As - Arsenic
Se - Selenium
S - Sulfur

There would be another colourful version, but this shows the basic idea.

[php1ic]

For something that is narrower and taller

+---+----+----+---+----+
| N | U  | Cl | E | Ar |
+---+----+----+---+----+
| M | As | Se | S |
+---+----+----+---+

The off-center "U" stands out a bit so not sure about this one.