In Mo Yan's work," Gale," what was the function of the following sentences? Please appreciate it.

The setting sun appeared quietly, and the river was red like cold molten iron. The crops slowly straightened up. His grandfather was like a bronze statue as he maintained a forceful posture. The wind had swept away all the grass on our carriage. No, there was still a blade of grass stuck in the tenon of the carriage beam. I held up the grass for Grandpa to see. It was just an ordinary old grass, and I didn't know if it was red or green. Grandpa, there's only one blade of grass left." I said a little ruefully. "It's getting dark. Let's go." Grandpa said as he bent down to push the cart.