Green coat.
The willow tree seems to be painted with something imitating "White Birch". In front of my window, there is a white birch, which seems to be coated with silver frost and covered with snowflakes; the white birch tree is silver-white, so it is painted There is silver frost, and the willow tree is a light green color, so the willow tree is painted with a green coat.
When copying sentences, you need to analyze the sentence structure, syntax, grammatical structure and semantic content of the original sentence to find out the basic structure of words, phrases and sentences.