Here’s another example of a sketch I do (before I paint!) to figure out the design/composition, and how the eye moves within the painting.  The asterisk represents the start point, and the arrows represent where I believe the eye will be lead.  The top-left composition is based on a triangle.  I think the eye will start at the top-right building (because it sits higher than the lines below it), the eye to follow down, and then lead back up either via the distant hills or the bottom of the hill line.