diff --git a/index.html b/index.html
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+++ b/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <!-- Minified version -->
+    <link rel="stylesheet" href="https://cdn.simplecss.org/simple.min.css">
+    <title>Automated Garbage Segregation</title>
+    <style>
+        /* strict dark theme from simple.css */
+        /* :root {
+            color-scheme:dark;
+            --bg: #212121;
+            --accent-bg: #2b2b2b;
+            --text: #dcdcdc;
+            --text-light: #ababab;
+            --accent: #ffb300;
+            --code: #f06292;
+            --preformatted: #ccc;
+            --disabled: #111
+        }
+
+        img,video {
+            opacity: .8
+        } */
+
+        body, html {
+            padding: 0;
+            margin: 0;
+            height: 100%;
+            width: 100%;
+        }
+
+        #main {
+            width: 100%;
+            height: 100%;
+            display: grid;
+            grid-template-columns: 1fr 2fr;
+        }
+
+        #main > div {
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100%;
+        }
+    </style>
+</head>
+<body>
+    <div id="main" v-scope @mounted="mounted()" @unmounted="unmounted()">
+        <div id="image">
+            <img :src="image" alt="item">
+        </div>
+        <div id="status">
+            <h1>{{ status }}</h1>
+        </div>
+    </div>
+    <script src="https://unpkg.com/petite-vue@0.2.2/dist/petite-vue.iife.js"></script>
+    <script>
+        let app = PetiteVue.createApp({
+            intervalId: -1,
+            pollingInterval: 500,
+            placeholder: "/static/scroll-down.gif",
+            loader: "/static/loader.gif",
+            imageUrl: "/photo",
+            type: "未知",
+            state: "put",
+            get image() {
+                if (this.state == "put") return this.placeholder;
+                if (this.state == "camera") return this.loader;
+
+                return this.imageUrl;
+            },
+            get status() {
+                let data = {
+                    "put": "請放置垃圾",
+                    "camera": "拍照中，請勿移動",
+                    "identify": "辨識中",
+                    "identified": this.type,
+                }
+                return data[this.state];
+            },
+            mounted() {
+                console.log("mounted");
+                if (this.intervalId < 0) this.intervalId = setInterval(() => { this.polling(); }, this.pollingInterval);
+            },
+            unmounted() {
+                console.log("unmounted");
+                if (this.intervalId >= 0) {
+                    clearInterval(this.intervalId);
+                }
+            },
+            update(data) {
+                let state = data.state;
+                if (state == "identified") this.type = data.type;
+                if (state == "identify") this.imageUrl = data.imageUrl;
+
+                this.state = state;
+            },
+            async polling() {
+                let res, data;
+                try {
+                    res = await fetch("/poll");
+                    data = await res.json();
+                } catch (error) {
+                    console.error(error);
+                    return;
+                }
+
+                this.update(data);
+            }
+        });
+        app.mount("#main");
+    </script>
+</body>
+</html>
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