diff --git a/serpentine/serpentine.py b/serpentine/serpentine.py
new file mode 100755
index 0000000..95f98cf
--- /dev/null
+++ b/serpentine/serpentine.py
@@ -0,0 +1,82 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+import random
+import sys
+
+
+
+def str_xor(secret, key):
+    #extend key to secret length
+    new_key = key
+    i = 0
+    while len(new_key) < len(secret):
+        new_key = new_key + key[i]
+        i = (i + 1) % len(key)        
+    return "".join([chr(ord(secret_c) ^ ord(new_key_c)) for (secret_c,new_key_c) in zip(secret,new_key)])
+
+
+flag_enc = chr(0x15) + chr(0x07) + chr(0x08) + chr(0x06) + chr(0x27) + chr(0x21) + chr(0x23) + chr(0x15) + chr(0x5c) + chr(0x01) + chr(0x57) + chr(0x2a) + chr(0x17) + chr(0x5e) + chr(0x5f) + chr(0x0d) + chr(0x3b) + chr(0x19) + chr(0x56) + chr(0x5b) + chr(0x5e) + chr(0x36) + chr(0x53) + chr(0x07) + chr(0x51) + chr(0x18) + chr(0x58) + chr(0x05) + chr(0x57) + chr(0x11) + chr(0x3a) + chr(0x0f) + chr(0x0a) + chr(0x5b) + chr(0x57) + chr(0x41) + chr(0x55) + chr(0x0c) + chr(0x59) + chr(0x14)
+
+
+def print_flag():
+  flag = str_xor(flag_enc, 'enkidu')
+  print(flag)
+
+
+def print_encouragement():
+  encouragements = ['You can do it!', 'Keep it up!', 
+                    'Look how far you\'ve come!']
+  choice = random.choice(range(0, len(encouragements)))
+  print('\n-----------------------------------------------------')
+  print(encouragements[choice])
+  print('-----------------------------------------------------\n\n')
+
+
+
+def main():
+
+  print(
+'''
+    Y
+  .-^-.
+ /     \      .- ~ ~ -.
+()     ()    /   _ _   `.                     _ _ _
+ \_   _/    /  /     \   \                . ~  _ _  ~ .
+   | |     /  /       \   \             .' .~       ~-. `.
+   | |    /  /         )   )           /  /             `.`.
+   \ \_ _/  /         /   /           /  /                `'
+    \_ _ _.'         /   /           (  (
+                    /   /             \  \\
+                   /   /               \  \\
+                  /   /                 )  )
+                 (   (                 /  /
+                  `.  `.             .'  /
+                    `.   ~ - - - - ~   .'
+                       ~ . _ _ _ _ . ~
+'''
+  )
+  print('Welcome to the serpentine encourager!\n\n')
+  
+  while True:
+    print('a) Print encouragement')
+    print('b) Print flag')
+    print('c) Quit\n')
+    choice = input('What would you like to do? (a/b/c) ')
+    
+    if choice == 'a':
+      print_encouragement()
+      
+    elif choice == 'b':
+      print('\nOops! I must have misplaced the print_flag function! Check my source code!\n\n')
+      
+    elif choice == 'c':
+      sys.exit(0)
+      
+    else:
+      print('\nI did not understand "' + choice + '", input only "a", "b" or "c"\n\n')
+
+
+
+if __name__ == "__main__":
+  main()
+