diff --git a/src/App.vue b/src/App.vue
index 633a5dfe4e547c48bfa93740a290ba5ba370930a..27af5fe340d7f6e2a4dc97c331d70344628ef183 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,47 +1,58 @@
 <script setup>
-import HelloWorld from './components/HelloWorld.vue'
-import TheWelcome from './components/TheWelcome.vue'
+import {ref,reactive,shallowRef} from 'vue'
+const obj = shallowRef({
+    level:1,
+    grandFather:{
+        level:2,
+        father:{
+            level:3,
+            son:{
+                level:4,
+                grandSon:{
+                    level:5,
+                    name:'grandSon'
+                }
+            }
+        }
+    }
+})
+
+const count = ref(1)
+const obj1 = reactive({
+    count
+})
+
+const books = reactive([
+    ref('vue3.0')
+])
+
+console.log(books[0].value)
+
+function changeGrandFather(){
+    obj.value.level = 2
+}
 </script>
 
 <template>
-  <header>
-    <img alt="Vue logo" class="logo" src="./assets/logo.svg" width="125" height="125" />
-
-    <div class="wrapper">
-      <HelloWorld msg="You did it!" />
-    </div>
-  </header>
-
-  <main>
-    <TheWelcome />
-  </main>
+  <div>
+    {{count}}-{{obj1}}-{{books}}
+    <button @click="obj1.count = 2"></button>
+    <pre>{{obj}}</pre>
+    <!-- {{obj}} -->
+    <hr/>
+    <button @click="obj={name:'obj'}">obj</button>
+    <button @click="obj.level++">changeGrandFather</button>
+    <button @click="obj.grandFather.level++">changeFather</button>
+    <button @click="obj.grandFather.father.level++">changeSon</button>
+    <button @click="obj.grandFather.father.son.level++">changeGrandSon</button>
+    <button @click="obj.grandFather.father.son.grandSon.level++">lastLevel</button>
+    <button @click="obj.name='grandFather'">+grandFather</button>
+    <button @click="obj.grandFather.name = 'father'">+father</button>
+    <button @click="obj.grandFather.father.name = 'son'">+son</button>
+    <button @click="obj.grandFather.father.son.grandSon.age = 12">++</button>  
+  </div>
 </template>
 
 <style scoped>
-header {
-  line-height: 1.5;
-}
 
-.logo {
-  display: block;
-  margin: 0 auto 2rem;
-}
-
-@media (min-width: 1024px) {
-  header {
-    display: flex;
-    place-items: center;
-    padding-right: calc(var(--section-gap) / 2);
-  }
-
-  .logo {
-    margin: 0 2rem 0 0;
-  }
-
-  header .wrapper {
-    display: flex;
-    place-items: flex-start;
-    flex-wrap: wrap;
-  }
-}
 </style>