1-Start with a letter “Y” shape.This should be drawn with shaky lines, not straight.
2-Add two letter “V’s” to the tops of the “y” shape as shown.The “V should be smaller than the ‘Y’ opening.
3-Add four more “V’s” to the top of the “V’s” drawn in step 2.Keep adding “V’s” until your drawing looks like a cracked surface.