for my mom zentangle animals. learn about elements and principles of art. have a design that corresponds with each individual element/principal as separate small sketches. Then combine the parts into a larger zentangle design within the animal silhouette.
Here you can see the division of warm and cool colours. Warm colours are the more "bright" colours and cool colours are the more "dark" colours. Warm starts at oink and ends at yellow,cool starts at green and ends at purple.