Oh my goodness, this is adorable! Drill little marble sized holes in the fence, put a little glue on each marble, and shimmy into the hole. This photo is what it looks like on her fence when the sun hits it - so, so pretty!
The sun 'travels' different paths throughout the season. The summer sun is high, while the winter sun is low. Passive solar design situates the house and is built with certain materials to help it to be warm in the winter and cool in the summer.