The following four pictures describe an incident that happened after school one day. Please make a reasonable imagination according to these pictures and write a diary in English.

When I walked out of school this afternoon, the weather changed. There are thick dark clouds in the sky. I began to feel worried because I didn't bring my umbrella or raincoat when I left home in the morning. It began to rain soon. When I hurried home, I heard someone calling me from behind. I looked back and it was Li Ping. He has an umbrella, let me use it with him. He walked with me all the way until I got home. How grateful I am for his kindness!

This is a composition for the material. The material of this topic is four pictures. Look at the picture carefully before you start writing, understand the content of the picture and expand your reasonable imagination. Then organize the language according to the content of the material, list a simple outline, and determine the tense and keywords of the sentence. According to the content, we can know that the person in this article is mostly the third person, and the tense should generally use the simple past tense.