diff --git a/static/lib.js b/static/lib.js
index ccd9ab6..2f26151 100644
--- a/static/lib.js
+++ b/static/lib.js
@@ -2,16 +2,19 @@ class TimeseriesGraph extends HTMLElement {
     #uri;
     #width;
     #height;
+    #intervalId;
+    #pollSeconds;
     constructor() {
         super();
         const root = this.attachShadow({ mode: "open" });
         var template = document.getElementById("timeseries_template");
         this.#width = 1000;
-        this.height = 500;
+        this.#height = 500;
+        this.#pollSeconds = 5;
         root.appendChild(template.content.cloneNode(true));
     }
 
-    static observedAttributes = ['uri', 'width', 'height'];
+    static observedAttributes = ['uri', 'width', 'height', 'poll-seconds'];
 
     attributeChanged(name, _oldValue, newValue) {
         switch (name) {
@@ -24,6 +27,9 @@ class TimeseriesGraph extends HTMLElement {
            case 'height':
                 this.#height = newValue;
                 break;
+           case 'poll-seconds':
+                this.#pollSeconds = newValue;
+                break;
            default: // do nothing;
                 break;
         }
@@ -31,25 +37,40 @@ class TimeseriesGraph extends HTMLElement {
         // TODO(zaphar): reset update timer as well
     }
 
-    getTargetNode() {
-        console.log("shadowroot: ", this.shadowRoot);
-        return this.shadowRoot.firstChild;
-    }
-    
     connectedCallback() {
         // TODO(zaphar): Set up the timer loop to update graph data.
         this.#uri = this.getAttribute('uri');
         if (this.#uri) {
             this.updateGraph();
         }
+        this.resetInterval()
     }
 
     disconnectedCallback() {
         // TODO(zaphar): Turn off the timer loop to update graph.
+        clearInterval(this.#intervalId);
+        this.#intervalId = null;
     }
 
     static elementName = "timeseries-graph";
 
+    getTargetNode() {
+        console.log("shadowroot: ", this.shadowRoot);
+        return this.shadowRoot.firstChild;
+    }
+   
+    stopInterval() {
+        if (this.#intervalId) {
+            clearInterval(this.#intervalId);
+            this.#intervalId = null;
+        }
+    }
+    
+    resetInterval() {
+        this.stopInterval()
+        this.#intervalId = setInterval(() => this.updateGraph(), 1000 * this.#pollSeconds);
+    }
+
     static registerElement() {
         if (!customElements.get(TimeseriesGraph.elementName)) {
             customElements.define(TimeseriesGraph.elementName, TimeseriesGraph);