diff --git a/bigos/lecture20241203/matplot01.py b/bigos/lecture20241203/matplot01.py
new file mode 100644
index 0000000..4fc08c3
--- /dev/null
+++ b/bigos/lecture20241203/matplot01.py
@@ -0,0 +1,20 @@
+import matplotlib.pyplot as plt
+import numpy as np
+
+plt.style.use('_mpl-gallery')
+
+# Make data
+n = 100
+xs = np.linspace(0, 1, n)
+ys = np.sin(xs * 6 * np.pi)
+zs = np.cos(xs * 6 * np.pi)
+
+# Plot
+fig, ax = plt.subplots(subplot_kw={"projection": "3d"})
+ax.plot(xs, ys, zs)
+
+ax.set(xticklabels=[],
+       yticklabels=[],
+       zticklabels=[])
+
+plt.show()
\ No newline at end of file
diff --git a/bigos/lecture20241203/matplot02.py b/bigos/lecture20241203/matplot02.py
new file mode 100644
index 0000000..a404e90
--- /dev/null
+++ b/bigos/lecture20241203/matplot02.py
@@ -0,0 +1,24 @@
+import matplotlib.pyplot as plt
+import numpy as np
+
+plt.style.use('_mpl-gallery')
+
+# make data
+x = np.linspace(0, 10, 100)
+y = 4 + 1 * np.sin(2 * x)
+x2 = np.linspace(0, 10, 25)
+y2 = 4 + 1 * np.sin(2 * x2)
+
+print(x)
+
+# plot
+fig, ax = plt.subplots()
+
+#ax.plot(x2, y2 + 2.5, 'x', markeredgewidth=2)
+ax.plot(x, y, linewidth=2.0)
+#ax.plot(x2, y2 - 2.5, 'o-', linewidth=2)
+
+ax.set(xlim=(0, 8), xticks=np.arange(1, 8),
+       ylim=(0, 8), yticks=np.arange(1, 8))
+
+plt.show()
\ No newline at end of file
diff --git a/bigos/lecture20241203/numpy01.py b/bigos/lecture20241203/numpy01.py
new file mode 100644
index 0000000..ba302c3
--- /dev/null
+++ b/bigos/lecture20241203/numpy01.py
@@ -0,0 +1,8 @@
+import numpy as np
+from numpy import pi
+np.linspace(0, 2, 9)                   # 9 numbers from 0 to 2
+x = np.linspace(0, 2 * pi, 100)        # useful to evaluate function at lots of points
+f = np.sin(x)
+
+print(x)
+print(f)
diff --git a/bigos/lecture20241203a/barcode01.py b/bigos/lecture20241203a/barcode01.py
new file mode 100644
index 0000000..1a60c33
--- /dev/null
+++ b/bigos/lecture20241203a/barcode01.py
@@ -0,0 +1,12 @@
+# import EAN13 from barcode module
+from barcode import EAN13
+
+# Make sure to pass the number as string
+number = '5901234123457'
+
+# Now, let's create an object of EAN13
+# class and pass the number
+my_code = EAN13(number)
+
+# Our barcode is ready. Let's save it.
+my_code.save("new_code")
diff --git a/bigos/lecture20241203a/barcode02.py b/bigos/lecture20241203a/barcode02.py
new file mode 100644
index 0000000..f5089ee
--- /dev/null
+++ b/bigos/lecture20241203a/barcode02.py
@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# https://stackoverflow.com/questions/57427243/how-to-generate-barcode-in-python-3-7
+
+import barcode
+from barcode.writer import ImageWriter
+
+def testEan():
+    EAN = barcode.get_barcode_class('ean13')
+    ean = EAN(u'123456789011', writer=ImageWriter())
+    fullname = ean.save('my_ean13_barcode')
+
+if __name__ == '__main__':
+    testEan()
+
diff --git a/bigos/lecture20241203a/basic_qrcode.png b/bigos/lecture20241203a/basic_qrcode.png
new file mode 100644
index 0000000..d26782d
Binary files /dev/null and b/bigos/lecture20241203a/basic_qrcode.png differ
diff --git a/bigos/lecture20241203a/my_ean13_barcode.png b/bigos/lecture20241203a/my_ean13_barcode.png
new file mode 100644
index 0000000..77935f6
Binary files /dev/null and b/bigos/lecture20241203a/my_ean13_barcode.png differ
diff --git a/bigos/lecture20241203a/myqr.png b/bigos/lecture20241203a/myqr.png
new file mode 100644
index 0000000..33857ba
Binary files /dev/null and b/bigos/lecture20241203a/myqr.png differ
diff --git a/bigos/lecture20241203a/myqr.svg b/bigos/lecture20241203a/myqr.svg
new file mode 100644
index 0000000..eb0d0b7
--- /dev/null
+++ b/bigos/lecture20241203a/myqr.svg
@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" height="264" width="264" class="pyqrcode"><path transform="scale(8)" stroke="#000" class="pyqrline" d="M4 4.5h7m1 0h2m1 0h1m2 0h1m3 0h7m-25 1h1m5 0h1m1 0h1m2 0h1m2 0h1m1 0h1m1 0h1m5 0h1m-25 1h1m1 0h3m1 0h1m5 0h2m2 0h1m1 0h1m1 0h3m1 0h1m-25 1h1m1 0h3m1 0h1m1 0h1m1 0h2m2 0h2m2 0h1m1 0h3m1 0h1m-25 1h1m1 0h3m1 0h1m1 0h1m1 0h1m1 0h1m1 0h3m1 0h1m1 0h3m1 0h1m-25 1h1m5 0h1m1 0h2m3 0h2m1 0h1m1 0h1m5 0h1m-25 1h7m1 0h1m1 0h1m1 0h1m1 0h1m1 0h1m1 0h7m-14 1h1m2 0h1m1 0h1m-14 1h1m2 0h1m4 0h4m1 0h1m2 0h3m1 0h2m-25 1h1m1 0h3m2 0h1m1 0h1m2 0h1m1 0h1m1 0h4m3 0h2m-25 1h1m2 0h1m2 0h1m1 0h2m5 0h3m3 0h1m1 0h2m-25 1h1m1 0h1m1 0h1m2 0h1m2 0h2m1 0h1m4 0h3m2 0h2m-25 1h1m1 0h2m1 0h3m1 0h3m1 0h1m2 0h3m2 0h1m2 0h1m-24 1h2m1 0h2m2 0h1m2 0h3m1 0h1m1 0h3m2 0h1m1 0h1m-25 1h1m3 0h4m1 0h3m1 0h1m1 0h2m1 0h3m1 0h1m1 0h1m-24 1h2m1 0h1m2 0h1m1 0h1m2 0h1m3 0h1m2 0h1m1 0h1m2 0h1m-25 1h2m1 0h1m2 0h2m1 0h2m1 0h9m1 0h1m1 0h1m-17 1h3m4 0h2m3 0h1m1 0h1m1 0h1m-25 1h7m2 0h1m2 0h1m3 0h1m1 0h1m1 0h1m2 0h2m-25 1h1m5 0h1m3 0h1m1 0h5m3 0h1m1 0h1m-23 1h1m1 0h3m1 0h1m2 0h2m2 0h1m2 0h6m-22 1h1m1 0h3m1 0h1m1 0h1m3 0h1m1 0h1m4 0h3m1 0h1m-24 1h1m1 0h3m1 0h1m2 0h1m3 0h1m1 0h1m4 0h3m1 0h1m-25 1h1m5 0h1m2 0h1m2 0h2m2 0h2m1 0h2m-21 1h7m3 0h1m2 0h4m1 0h4m1 0h2"/></svg>
diff --git a/bigos/lecture20241203a/qrcode01.py b/bigos/lecture20241203a/qrcode01.py
new file mode 100644
index 0000000..6f855d5
--- /dev/null
+++ b/bigos/lecture20241203a/qrcode01.py
@@ -0,0 +1,6 @@
+# basic_qrcode.py
+
+import segno
+
+qrcode = segno.make_qr("Hello, World")
+qrcode.save("basic_qrcode.png")
diff --git a/bigos/lecture20241203a/qrcode02.py b/bigos/lecture20241203a/qrcode02.py
new file mode 100644
index 0000000..ae1992d
--- /dev/null
+++ b/bigos/lecture20241203a/qrcode02.py
@@ -0,0 +1,21 @@
+# Import QRCode from pyqrcode
+
+# from https://www.geeksforgeeks.org/python-generate-qr-code-using-pyqrcode-module/
+
+import pyqrcode
+import png
+from pyqrcode import QRCode
+
+
+# String which represents the QR code
+#s = "www.geeksforgeeks.org"
+s = "cset.stcc.edu"
+
+# Generate QR code
+url = pyqrcode.create(s)
+
+# Create and save the svg file naming "myqr.svg"
+url.svg("myqr.svg", scale = 8)
+
+# Create and save the png file naming "myqr.png"
+url.png('myqr.png', scale = 6)