diff --git a/plan-coordinates.js b/plan-coordinates.js
new file mode 100644
index 0000000..17aac0d
--- /dev/null
+++ b/plan-coordinates.js
@@ -0,0 +1,55 @@
+class PlanCoordinates extends HTMLElement {
+
+  constructor() {
+    super();
+    this.attachShadow({ mode: 'open' });
+  }
+
+  setConfig(config) {
+    const root = this.shadowRoot;
+    if (root.lastChild) root.removeChild(root.lastChild);
+    this.style.display = 'none';
+    const card = document.createElement('div');
+    card.id = "plan-coordinates"
+    const content = document.createElement('div');
+    const style = document.createElement('style');
+    style.textContent = `
+        #plan-coordinates {
+          position: absolute;
+          right: 0px;
+          top: 16px;
+          z-index: 1000;
+        }
+        #content {
+          background-color: var(--paper-card-background-color);
+          border: 1px solid var(--label-badge-blue);
+          padding: 16px;
+        }
+      `;
+    content.id = "content";
+    card.appendChild(content);
+    root.appendChild(style);
+    root.appendChild(card);
+    document.addEventListener("mousemove", el => {
+      let calc_top = 16 - (document.body.querySelector('home-assistant').getBoundingClientRect().top);
+      card.style.top = `${calc_top}px`;
+      if (el.path[0] && el.path[0].tagName == 'IMG') {
+        this.style.display = 'block';
+        const percentX = Math.ceil((el.clientX - el.path[0].x) * 100 / el.path[0].width);
+        const percentY = Math.ceil((el.clientY - el.path[0].y) * 100 / el.path[0].height);
+        content.innerHTML = `left: ${percentX}%<br/>top: ${percentY}%`;
+      }
+    });
+    document.addEventListener('scroll', el => {
+      let calc_top = 16 - (document.body.querySelector('home-assistant').getBoundingClientRect().top);
+      card.style.top = `${calc_top}px`;
+    }, true);
+  }
+  set hass(hass) {
+  }
+
+  getCardSize() {
+    return 1;
+  }
+}
+customElements.define('plan-coordinates', PlanCoordinates);