beams of grey and light of gray,
crossing through this winter day,
come to dance along the line
and tune your balance far more fine
than those walking below on clay.
An important distinction: in my head, grey and gray are two different colors or hues, grey being closer to black (about 75%) and gray being closer to white (about 25%). I also pronounce them slightly differently: grey has more of an "eh" sound, while gray has a much longer and harder "ay" sound. When read as if they are two distinct colors, the first line becomes less repetitive, as the mind recognizes them as homonyms instead of synonyms.