请根据以下提示，并结合事例，用英语写一篇短文。
People are always looking for someone to look up to and imitate. You can set the example by becoming the person that people want to be like. You can help change the world by changing yourself.
注意：①无须写标题；
②除诗歌外，文体不限；
③内容必须结合你生活中的一个事例；
④文中不得透露个人姓名和学校名称；
⑤词数不少于120，如引用提示语则不计入总词数。