Create a medium greyscale, full-page coloring page that will transport the artist into the historical landscapes of Greece. In the foreground, sketch a prominent Greek flag, waving in an unseen breeze. Its bold stripes should be rendered in simple line art, awaiting the gentle shading of greys. Behind the flag, depict the crumbling facades of ancient ruins. These historic structures, such as columns, archways, and weathered stones, should have intricate details that call for attentive coloring. In the background, capture the calm expanse of the Mediterranean Sea, with subtle waves and gradients allowing for artistic expression. The sky should be adorned with soft, undulating clouds, offering a balance between simplicity and complexity for the coloring enthusiast. Texture and depth should be implied through diffused line work, enabling users to experiment with various shading techniques and mediums. The composition must guide the artist's eye through a journey from the patriotic symbol of the flag, through the passage of time seen in the ruins, and finally to the tranquil sea, all unified by the greyscale theme. This coloring page will be an elegant and timeless exploration of Greek heritage for artists of all levels --ar 17:22 --s 50