diff --git a/gui/Time/test.py b/gui/Time/test.py
new file mode 100755
index 0000000..50ea49e
--- /dev/null
+++ b/gui/Time/test.py
@@ -0,0 +1,63 @@
+#!/usr/bin/python
+"""
+	Scyther : An automatic verifier for security protocols.
+	Copyright (C) 2008 Cas Cremers
+
+	This program is free software; you can redistribute it and/or
+	modify it under the terms of the GNU General Public License
+	as published by the Free Software Foundation; either version 2
+	of the License, or (at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+"""
+
+#
+# test.py
+# experimenting with the constraint solver
+#
+# Ubuntu package: python-constraint
+#
+# http://labix.org/python-constraint
+#
+
+#---------------------------------------------------------------------------
+
+""" Import externals """
+import sys
+try:
+    from constraint import *
+except:
+    print "Could not import constraint solver module."
+    print "For more information, visit"
+    print "  http://labix.org/python-constraint"
+    sys.exit()
+
+#---------------------------------------------------------------------------
+
+def test():
+    problem = Problem()
+    problem.addVariables(range(0, 16), range(1, 16+1))
+    problem.addConstraint(AllDifferentConstraint(), range(0, 16))
+    problem.addConstraint(ExactSumConstraint(34), [0,5,10,15])
+    problem.addConstraint(ExactSumConstraint(34), [3,6,9,12])
+    for row in range(4):
+        problem.addConstraint(ExactSumConstraint(34),
+                              [row*4+i for i in range(4)])
+    for col in range(4):
+        problem.addConstraint(ExactSumConstraint(34),
+                              [col+4*i for i in range(4)])
+    solutions = problem.getSolutions()
+    print solutions
+
+#---------------------------------------------------------------------------
+
+if __name__ == '__main__':
+    test()
+