Sherman's Gallifreyan was created in the summer of 2011 when creator Loren Sherman needed to write something in the language's predecessor (Bettenbender's Gallifreyan) but didn't have the alphabet on hand. Modifying it from memory, Sherman's Circular Gallifreyan was created. All forms of Gallifreyan (Bettenbender's, Circular/Sherman's. Doctor's Cot) are based off of Gallifreyan in the show Doctor Who. They're fan made however, because the Gallifreyan in the show cannot be decoded because there is simply nothing to decode.
The single dot and quadruple dot consonants are there for use but are frowned upon. Replace C with either S or K phonetically.
Words and sentences can have layers if they are rather long. As shown below. The word layer is treated as an extra word circle while a sentence circle would have the words put on it rather than put in it.
Here is the Gallifreyan alphabet as so (in word circle format), A B CH D E F G H I J K L M N O P QU R S SH T U V W X Y Z with TH and NG off to the side.
All human beings are born free and equal in dignity and rights.
(Part of article 1 of the Universal Declaration of Human Rights)
To learn more about Gallifreyan, such as a guide to the writing system itself, a guide to its math or musical systems, go to http://www.shermansplanet.com/gallifreyan and click on Guide.
Details of the Circular Gallifreyan alphabet