What do the yellow and green parts of the colorful clouds represent?

1932, when Ren Guang was the director of the program department of EMI Records Company, together with Nie Er, he created a batch of national orchestral music for EMI Band. Chasing the Moon in Clouds is one of them, written in 1935. 1960 Peng Xiuwen rearranged the orchestration according to the band of the Central Broadcasting National Orchestra. Music vividly depicts the charming scenery of the vast night sky with the melody of the national pentatonic scale, the free modeling of the first five degrees, the alternating performance of clarinet and erhu, the brisk rhythm of plucked instruments, the plucking of bass instruments and the ethereal timbre of hanging cymbals. The artistic conception of "cloud chasing the moon" means that the artistic conception of cloud chasing the moon creates the picture of the night sky, and "color" represents color. The night when you can see the color will definitely not be very dark. It has a few months of glory, and the moonlight is like water, clear and transparent. The word "chase" gives this painting a sense of movement, and there is some life in the darkness. Under the dim night background, clouds and the moon meet and set each other off. Appreciating the melody of Chasing the Moon by Clouds is written in China's pentatonic scale, which is simple, simple, smooth and lyrical. In the first paragraph, the flute, flute, pipa, erhu and Hu Zhong played together, and the strings were harmonious and leisurely. , dulcimer and plucking lamp. ...