What is the function of each part of poetry?

The first verse waved goodbye to the clouds in the western sky with three words of "tenderness", which set a lyrical tone for the whole poem, full of deep feelings and faint helplessness and sadness.

In the second section, I wrote about the willows on the shore. "Golden Willow" is a vivid description of willow trees in the sunset. It is beautiful and graceful, like a "bride", which not only symbolizes its physical beauty, but also conveys the poet's infinite joy and attachment.

In the third section, I wrote about the aquatic plants in He Kanghe River. The green aquatic plants are swaying in the water waves, comfortable and calm.

The fourth section, write the pool under the elm tree. The clear spring reflects the rainbow in the sky, colorful, and floating algae seem to precipitate the dream of the rainbow. Blend feelings into the scene and bring people into a dreamlike artistic conception.

The fifth section, the poet's feelings reached a climax. In the process of wandering around the scenery, the poet seems to forget his dream of leaving soon and walking with a long pole to find a "rainbow".

In the sixth section, the extremes meet, and joy begets sorrow. The poet returns to reality from fantasy and is depressed.

Section 7 echoes the beginning.