How to write the composition of a poem for Xiaoshu?

There is a tree in front of the door. It was planted by my father in the yard more than 2 years ago. It is unique and strong. It has undergone many changes, and it has never moved. It has been thriving and dotted with the scenery of my hometown. In summer, parents are shielded from the hot sunshine, and in spring, parents are given a little bird singing and singing. Especially in the cold winter in Na Yue, when other trees are already littered and desolate everywhere, it still quietly guards the small courtyard, which is green, handsome and full of vitality. Bringing winter hope to parents, I often lament the strength, exuberant vitality and unyielding character of young trees. I remember that 15 years ago, when the three brothers were still studying hard, Xiaoshu became a landscape with them, silently praying for the healthy growth of Xiaoshu, which still grew quietly in the small yard regardless of wind, rain and sun. In those hard times, three rural boys, leaving home to study, was the only way out. "Study hard" is often a good medicine for dad to inculcate and persuade. However, in the spring and autumn of each year, it is a time when the whole family is troubled. Where to raise tuition fees and where to find the living expenses of the three brothers is the most arduous and sacred task for parents. Anything that can be sold is sold, and anything that can be borrowed is borrowed from others for our schooling. The parents have suffered a lot, they haven't bought clothes for several years, they can't afford to wear flip-flops and their father can't even afford a decent razor. That little tree was called a landscape tree at that time, and it can also be sold to some government agencies or schools to beautify and green the environment. Someone also asked if he wanted to buy it, but his father refused to buy it, and he didn't understand why he didn't buy an irrelevant landscape tree. Father said, "Let it grow in the yard!"! Maybe it can grow into a towering tree. " In a few short years, the young trees have grown tall and strong, and the branches and leaves have spread around. The three brothers changed from school to school to study, and they also succeeded in their studies. They each had their own careers and did what they liked. Although the family is poor, it is also happy. Every weekend or holiday, the whole family lives under one roof for four generations, but the squeak of small trees and the sound of birds can be heard outside. A few years ago, the situation at home got better and I was going to build a new house. I proposed to cut down the tree and make room for building, but my father severely reprimanded me. The father said, "I didn't sell it in the past few years, but now I have to cut down trees to repair the house when the conditions are good?" Father didn't go on, but he resolutely refused to cut down or move the land. If so, the tree would die. Whenever we go to work to do our own thing, this tree is their child, carefully cared for, watered, fertilized and carefully cultivated. Today, the young trees have grown up, flourishing, tall and straight, sheltering from the wind and rain. Magpies build nests, cuckoos sing, cicadas sing, and once in a while, I vaguely feel the vitality of this harmonious and quiet courtyard. I thought to myself, fortunately, it was really gratifying that I didn't cut down trees or move the ground. After so many years, the tree in front of the door is still a landscape of my hometown. Never move the ground, never bend over, stand tall and straight, and grow upright. On the contrary, the three brothers moved a lot and continued to do what they liked, but rarely went home to talk to their parents and talk about work. It seems that they believe in their children as much as they believe in this tree. They don't have to worry or care, grow up in the sun and hone in the wind and rain. The young trees have grown up, exceeding the height of the houses next to the small courtyard, and may grow into towering trees in a few years, and the shade will become interesting. That's what the whole family wants to see.