diff --git a/block.py b/block.py
new file mode 100644
index 0000000..c3b4efb
--- /dev/null
+++ b/block.py
@@ -0,0 +1,33 @@
+from lib.input import *
+from lib.vars import alphabet
+from lib.vars import listToString
+
+if( inputHasKeys(["-k", "-i", "-t"]) ):
+    in_key = getValueOfKey("-k")
+    in_txt = getValueOfKey("-i")
+    in_mode = int(getValueOfKey("-t"))
+    blockSize = len(in_key)
+else:
+    print("file.py -k {int KEY} -i {string TXT} -t {MODE}")
+    print("-k: The encryption/decryption key")
+    print("-i: The text to be encrypted/decrypted")
+    print("-t: The mode (0=encrypt or 1=decrypt)")
+    exit()
+
+def keyToIntTuple(key):
+    return tuple(map(int, list(key)))
+
+def applyKeyToBlock(keyT, blockL): # function to apply a key to a block
+    blockDe = [""] * blockSize
+
+    for i in range(blockSize):
+        blockDe[i] = blockL[keyT[i]] 
+    
+    print(blockDe)
+    return blockDe
+
+KEY = keyToIntTuple(in_key) # define and make the key a tuple so that we can index it
+
+applyKeyToBlock(keyToIntTuple(in_key), list(in_txt))
+
+ 
diff --git a/caesar.py b/caesar.py
index 3740b4c..016daf6 100644
--- a/caesar.py
+++ b/caesar.py
@@ -26,7 +26,8 @@ for char in txt_list: # loop through all of the chars
     print("Decrypting char-index: " + str(charindex) + " (" + char + ")")
 
     index = index + in_key # shift the alphabet
-    while( index > alen - 1 ): #cycle through the alphabet 
+    while( index > alen - 1 ): #cycle through the alphabet
+        print("Alphabet cycle")
         index = (index + in_key) - (alen - 1)
 
     decryp_list[charindex] = alphabet[in_alphabet][index]