Garth in the slanted rain

Garth in the slanted rain says arms bend at the rainbow. 3 years growing: his own spectrum. Take off my feet, he yells. Bird need wings. Take out the stars. Give me some. In the wet grass he marks constellations: maple leaf, mushroom, twig. Footprint, he says: Rain

walk here. Where rain home? Question easy as water & already I can't answer.