diff --git a/hw3/Claudio_Maggioni/scripts/app.js b/hw3/Claudio_Maggioni/scripts/app.js
index 5277860..4eb8819 100644
--- a/hw3/Claudio_Maggioni/scripts/app.js
+++ b/hw3/Claudio_Maggioni/scripts/app.js
@@ -56,19 +56,31 @@ class App {
 
       const player = document.createElement('video');
       player.addEventListener('loadeddata', () => {
-        const imgCanvas = document.createElement('canvas');
-        imgCanvas.width = this.canvas.width;
-        imgCanvas.height = this.canvas.height;
-        const imgCtx = imgCanvas.getContext('2d');
-        imgCtx.drawImage(player, 0, 0, canvas.width, canvas.height);
-        const img = document.createElement('img');
-        img.src = imgCanvas.toDataURL();
-        img.addEventListener('load', () => {
-          this.background = img;
-          this.redrawAll();
-        });
+        player.play();
+        setTimeout(() => {
+          const imgCanvas = document.createElement('canvas');
+          imgCanvas.width = this.canvas.width;
+          imgCanvas.height = this.canvas.height;
+          const imgCtx = imgCanvas.getContext('2d');
+          imgCtx.drawImage(player, 0, 0, canvas.width, canvas.height);
+          const imgData = imgCtx.getImageData(0, 0, imgCanvas.width,
+            imgCanvas.height);
 
-        player.srcObject.getVideoTracks().forEach(track => track.stop());
+          for (let i = 0; i < data.length; i += 4) {
+            const pixel = (data[i] + 2 * data[i+1] + data[i+2]) / 4;
+            data[i] = data[i+1] = data[i+2] = pixel;
+          }
+          imgCtx.putImageData(imgData, 0, 0);
+
+          const img = document.createElement('img');
+          img.src = imgCanvas.toDataURL();
+          img.addEventListener('load', () => {
+            this.background = img;
+            this.redrawAll();
+          });
+
+          player.srcObject.getVideoTracks().forEach(track => track.stop());
+        }, 100);
       });
 
       const button = document.createElement('button');