What are the environments in Seven Matches and what are their functions?

There are many descriptions of that environment...

Environment:

1. At dawn, the rain stopped.

2. The climate in the grassland is strange. It is obviously a good weather with a bright moon and few stars. Suddenly a cold wind blows, and thick clouds seem to come out of the plains, instantly covering the sky tightly. Then, heavy rain mixed with hail as big as chestnuts poured down indiscriminately.

3. The entire grassland was immersed in the mist of rain and mist, no one could be seen or heard.

4. The weeds washed by the heavy rain, as if they had been combed with a comb, lay in the mud, even covering the road. The sky was still gloomy, and occasionally a few hailstones fell down, hitting the turbid green water and causing waves.

4. In the endless dark night, clusters of bonfires burned.

5. The soldiers who had been rolling around in the mud for several days in the wind, rain, and mud were chatting and laughing around the raging wildfire, with a layer of mist rising from their soaked clothes. The wild vegetables sounded "Qiannan"...

6. Reflecting the flickering firelight, he opened the party card with trembling fingers and handed the remaining six matches one by one. At the same time, the instructor was counting in a strange tone: "One, two, three, four..."

Function:

1. Enhance the atmosphere, "All scene language is love language."

2. Use the harsh and unpredictable environment at that time to highlight the incomparable preciousness of "fire".

3. Use the harsh and unpredictable environment at that time to highlight the Red Army’s ability to show no fear of difficulties and tenacity.

4. The blazing bonfire at the end of the article is in sharp contrast with the dank land where the unknown warrior lives. The word "fire" is used to express the praise of the unknown warrior.