diff --git a/content/Week_1_6/PA/Some_small_bugs.py b/content/Week_1_6/PA/Some_small_bugs.py
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+## Some small bugs for you to find!
+import numpy as np
+import matplotlib.pylab as plt
+import pandas as pd
+
+a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+b = np.linspace(0, 10, 11)
+
+print(a.size())
+
+for i in range(0, a.size):
+    a[i] = a[i] +a[i-1]
+
+# Does this look like a sine wave?
+plt.plot(a, np.sin(a), label='sin(a)')
+
+c = a+b