diff --git a/slice2nii_withLoop_w_comments.py b/slice2nii_withLoop_w_comments.py
new file mode 100644
index 0000000..3e92690
--- /dev/null
+++ b/slice2nii_withLoop_w_comments.py
@@ -0,0 +1,71 @@
+# convert a 2d histology/block tiff into a nift file
+# Import necessary libraries
+import fnmatch
+import os
+from skimage import io
+import numpy as np
+import sys
+import glob
+import matplotlib.pyplot as plt
+import matplotlib as mpl
+import matplotlib.cm as cm
+from skimage import img_as_ubyte
+import skimage.color as color
+import nibabel as nib
+
+# Function to save an image as a NIfTI file
+def save_nii(img, size, nii_file):
+    M = np.array([[size[0], 0, 0, 0],[0, size[1], 0, 0],[0, 0, size[2], 0],[0, 0, 0, 1]])
+    if img.ndim > 2:
+        if img.shape[2] == 3:
+            img = color.rgb2gray(img)
+        else:
+            img = img[...,0]
+    nii = nib.Nifti1Image(img, M)
+    nib.save(nii, nii_file)
+
+# Function to create a NIfTI object from an image
+def create_nii(img, size):
+    M = np.array([[size[0], 0, 0, 0],[0, size[1], 0, 0],[0, 0, size[2], 0],[0, 0, 0, 1]])
+    if img.ndim > 2:
+        if img.shape[2] == 3:
+            img = color.rgb2gray(img)
+        else:
+            img = img[...,0]
+    nii = nib.Nifti1Image(img, M)
+    return nii
+
+# Function to run the process of creating and saving a NIfTI file
+def run_create_nii(img_file, x_size, y_size, z_size, nii_file):
+    size = np.array([x_size, y_size, z_size, 0])
+    img = io.imread(img_file)
+    nii = create_nii(img, size)
+    nib.save(nii, nii_file)
+
+# Main function
+def main():
+    # Check if the correct number of arguments is provided
+    if len(sys.argv) != 8:
+        print('Usage: slice2nii.py <tiff_path> <x_size> <y_size> <z_size> <nifti_path> <start> <end>')
+        exit()
+
+    # Extract arguments from the command line
+    img_file = str(sys.argv[1])  # Absolute path to where the images are
+    x_size = float(sys.argv[2])
+    y_size = float(sys.argv[3])
+    z_size = float(sys.argv[4])
+    nii_file = str(sys.argv[5])
+    start = int(sys.argv[6])
+    end = int(sys.argv[7])
+
+    # Loop through the range of images
+    for i in range(start, end + 1, 1):
+        file_name = img_file + str(i) + ".tif"
+        if os.path.isfile(file_name):
+            print(i)
+            nii_name = nii_file + str(i) + ".nii"
+            run_create_nii(file_name, x_size, y_size, z_size, nii_name)
+
+# Run the main function if the script is executed
+if __name__ == '__main__':
+    main()