Clouds are colorful, agate should be frosted. what's the meaning

Cloud refers to the clouds in the sky, which spread out and present colorful colors. Agate is a kind of precious stone, which is especially bright on frosty days.

This sentence is a poem by Du Mu, a poet in the Tang Dynasty, "The Fence at Autumn Night Feeling Dawn". The whole poem echoes the scene of the autumn night sky, expressing the author's praise and sigh for the natural scenery. This poem can be extended to praise and appreciate beautiful things, and to feel sensitive and delicate about natural scenery. Convey a feeling for the beauty of nature and a love for life.