diff --git a/index.js b/index.js
new file mode 100644
index 0000000..84b128d
--- /dev/null
+++ b/index.js
@@ -0,0 +1,66 @@
+/**
+ * 使用代码来写日记
+ * 变量： 小驼峰
+ * 类： 大驼峰
+ * 常量: 大写
+ * 事件名: 小写 + ‘-’ 隔开
+ */
+
+let MyEmitter = require("events")
+
+const NOW_TIME = '2019-06-21 22:30'
+const WEATHER = 'rain'
+const MOOD = 'general'
+const TASK_EVALUATION = {
+  BAD: '完成的不好，需要加油哦！！！',
+  GOOD: '完成的很不错，再接再厉~',
+}
+
+class OneDay extends MyEmitter {
+  constructor() {
+    super()
+    this.tasks = []
+    this.addListener('start', (wakeUpTime) => {
+      this.wakeUpTime = wakeUpTime
+    })
+    this.addListener('end', () => {
+      this._printTasks()
+    })
+  }
+
+  doSomeThing(taskDesc, duration, score) {
+    let taskObj = this._getTaskObj(taskDesc, duration, score)
+    this.tasks.push(taskObj)
+  }
+
+  _printTasks() {
+    console.log(`---- 起床时间 ${this.wakeUpTime}`)
+    console.log(`---- 今天一共做了 ${this.tasks.length} 件事。以下是事情的描述和总结：`)
+    this.tasks.forEach((taskObj) => {
+      console.log("\n====================")
+      console.log(`事情描述： ${taskObj.desc}`)
+      console.log(`事情打分： ${taskObj.score}`)
+      console.log(`事情总结： ${taskObj.conclusion}`)
+      console.log("====================")
+    })
+  }
+
+  _getTaskObj(theTaskDesc, duration, score) {
+    let threshold = 2
+    let theTaskObj = {
+      desc: theTaskDesc,
+      score,
+      conclusion: score / duration >= threshold ? TASK_EVALUATION.GOOD : TASK_EVALUATION.BAD,
+    }
+    return theTaskObj
+  }
+}
+
+
+let myDay = new OneDay()
+myDay.emit("start", "07:00")
+myDay.doSomeThing("看《javascript高级程序设计》", 1, 3)
+myDay.doSomeThing("解决今天的第一个bug", 1, 4)
+myDay.doSomeThing("开周五周会", 2, 1)
+myDay.doSomeThing("健身", 1.5, 5)
+myDay.emit("end")