I think Mallah was referring to the shading on the areas of ice around the musical notes when he referred to Morse code, as indeed it is a series of dots and dashes and I was thinking of Morse code while doing it. Any messages embedded therein though would not be of my conscious addition. Not to say it isn't possible, lots of odd stuff comes through in art, though it could probably say something like "eat more kale" or "injun joe is ticklish" for all I know.
(No disrespect intended to Native Americans re "Injun Joe is ticklish", I am part Native American myself; that line refers to an old Merrie Melodies/Looney Tunes cartoon in which it is revealed at the end that that is the great secret that Sloppy Moe hints at and won't tell Porky, singing, "I know something I won't tell, I won't tell, I won't tell"
http://en.wikipedia.org/wiki/Wagon_Heels. No I'm not that old, this is a way old cartoon but they played reruns of these old non-PC cartoons back when I was a kid and even though I haven't watched TV in over a decade they are still firmly embedded in the ol' subconscious. Which is why I avoid TV now, I have enough cartoons and commercials stuck in there already to last a lifetime.)
The notes are musical notes but their shape is because it is a form of notation from the Middle Ages, like for writing out Gregorian chant and other forms of medieval music.
Thank you for your questions and comments!