When i made the sketch i draw the lines, often with a shaky hand too, so i can get the wobbly design easily.
doing this takes me around 5 minutes, so they aren't really hard to do, you only need to know where to place them and don't forget fog markings often cover the whole body in wild, fog like design, so just go wild!
important is that every "arm" is ending in a thin tip. often the "arms" are addicted to each other and want to meet the other one. sometimes with success, sometimes not, like they reaching out to each other in eternity
and again, like you can see: they cover 3-4 legs and begin at the feet, belly, head and/or back