diff --git a/tutorial.ipynb b/tutorial.ipynb
index e830496..4751bf7 100644
--- a/tutorial.ipynb
+++ b/tutorial.ipynb
@@ -563,7 +563,7 @@
         "clear_output()\n",
         "print('Setup complete. Using torch %s %s' % (torch.__version__, torch.cuda.get_device_properties(0) if torch.cuda.is_available() else 'CPU'))"
       ],
-      "execution_count": 1,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -689,7 +689,7 @@
         "torch.hub.download_url_to_file('https://github.com/ultralytics/yolov5/releases/download/v1.0/coco2017val.zip', 'tmp.zip')\n",
         "!unzip -q tmp.zip -d ../ && rm tmp.zip"
       ],
-      "execution_count": 2,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "display_data",
@@ -729,7 +729,7 @@
         "# Run YOLOv5x on COCO val2017\n",
         "!python test.py --weights yolov5x.pt --data coco.yaml --img 640"
       ],
-      "execution_count": 3,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -852,7 +852,7 @@
         "torch.hub.download_url_to_file('https://github.com/ultralytics/yolov5/releases/download/v1.0/coco128.zip', 'tmp.zip')\n",
         "!unzip -q tmp.zip -d ../ && rm tmp.zip"
       ],
-      "execution_count": 4,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "display_data",
@@ -916,7 +916,7 @@
         "# Train YOLOv5s on COCO128 for 3 epochs\n",
         "!python train.py --img 640 --batch 16 --epochs 3 --data coco128.yaml --weights yolov5s.pt --nosave --cache"
       ],
-      "execution_count": 5,
+      "execution_count": null,
       "outputs": [
         {
           "output_type": "stream",
@@ -1160,9 +1160,10 @@
         "%%shell\n",
         "export PYTHONPATH=\"$PWD\"  # to run *.py. files in subdirectories\n",
         "\n",
+        "rm -rf runs  # remove runs/\n",
         "for m in yolov5s; do  # models\n",
         "  python train.py --weights $m.pt --epochs 3 --img 320 --device 0  # train pretrained\n",
-        "  python train.py --cfg $m.yaml --epochs 3 --img 320 --device 0  # train scratch\n",
+        "  python train.py --weights '' --cfg $m.yaml --epochs 3 --img 320 --device 0  # train scratch\n",
         "  for d in 0 cpu; do  # devices\n",
         "    python detect.py --weights $m.pt --device $d  # detect official\n",
         "    python detect.py --weights runs/train/exp/weights/best.pt --device $d  # detect custom\n",