i have counted the runes beginning at the 13 red dots up to the 4 black dots . than i have counted the runes from that first 4 dots up to the next 4 dots. in the first block you can finde 0 R, only 1 S and 1 L. but in the second block there are 8 R, 7 S and 7 L. may it be, that the encryption changes everytime after the 4 dots?
i also worked with the 13 shift. i postet my results at "uncovering cicada". but this results are crazy and i don't know, if they are useful.