diff --git a/task-manager/playground/promise-chaining-2.js b/task-manager/playground/promise-chaining-2.js
index 5cbbb48..4b6e4a5 100644
--- a/task-manager/playground/promise-chaining-2.js
+++ b/task-manager/playground/promise-chaining-2.js
@@ -1,11 +1,23 @@
 require('../src/db/mongoose')
 const Task = require('../src/models/task')
 
-Task.findByIdAndDelete('5e52f573b7d229017fe21321').then((task) => {
-  console.log(task)
-  return Task.countDocuments({ completed: false })
-}).then((result) => {
-  console.log(result)
+// Task.findByIdAndDelete('5e52f573b7d229017fe21321').then((task) => {
+//   console.log(task)
+//   return Task.countDocuments({ completed: false })
+// }).then((result) => {
+//   console.log(result)
+// }).catch((e) => {
+//   console.log(e)
+// })
+
+const deleteTaskAndCount = async (id) => {
+  const task = await Task.findByIdAndDelete(id)
+  const count = await Task.countDocuments({ completed: false })
+  return count
+}
+
+deleteTaskAndCount('5e489156e9232d006872395e').then((count) => {
+  console.log(count)
 }).catch((e) => {
   console.log(e)
 })
diff --git a/task-manager/playground/promise-chaining.js b/task-manager/playground/promise-chaining.js
index 37c5b26..35003d2 100644
--- a/task-manager/playground/promise-chaining.js
+++ b/task-manager/playground/promise-chaining.js
@@ -1,13 +1,23 @@
 require('../src/db/mongoose')
 const User = require('../src/models/user')
 
-// 5e519e3404357c00d0777aee
+// User.findByIdAndUpdate('5e52f2612f736700e5a20797', { age: 1 }).then((user) => {
+//   console.log(user)
+//   return User.countDocuments({ age: 1 })
+// }).then((result) => {
+//   console.log(result)
+// }).catch((e) => {
+//   console.log(e)
+// })
 
-User.findByIdAndUpdate('5e52f2612f736700e5a20797', { age: 1 }).then((user) => {
-  console.log(user)
-  return User.countDocuments({ age: 1 })
-}).then((result) => {
-  console.log(result)
+const updateAgeAndCount = async (id, age) => {
+  const user = await User.findByIdAndUpdate(id, { age })
+  const count = await User.countDocuments({ age })
+  return count
+}
+
+updateAgeAndCount('5e52f2612f736700e5a20797', 2).then((count) => {
+  console.log(count)
 }).catch((e) => {
   console.log(e)
 })