added puzzle solution

matplottest.py

@@ -0,0 +1,17 @@
+import matplotlib.pyplot as plt
+import numpy as np
+
+x = np.linspace(0, 6*np.pi, 100)
+y = np.sin(x)
+
+# You probably won't need this if you're embedding things in a tkinter plot...
+plt.ion()
+
+fig = plt.figure()
+ax = fig.add_subplot(111)
+line1, = ax.plot(x, y, 'r-') # Returns a tuple of line objects, thus the comma
+
+for phase in np.linspace(0, 10*np.pi, 500):
+    line1.set_ydata(np.sin(x + phase))
+    fig.canvas.draw()
+    fig.canvas.flush_events()