This piece shows emphasis. The one red tree is the main focal point and center of interest. It is the same as all the other trees except that it's red. It's the dominant tree. Your attention is immediately drawn to the red tree.
Skoll and Hati. In Norse mythology these two wolves are responsible for changing day to night and vice versa by chasing the sun (Sol) and the moon (Mani) through the sky. Both are children of Fenrir, and therefore, grandchildren of Loki.