diff --git a/README.md b/README.md
index 560e7a2..c033b46 100644
--- a/README.md
+++ b/README.md
@@ -39,3 +39,30 @@ A card that will move to the left if it is zero and the right if it is one and t
 0
 0
 ```
+
+## Compiler/decompiler
+To make it easier to code there is a compiler and a decompiler awailable, if you have cards that you want to convert to a .tm-file you can use the decompiler:
+```
+./decompiler.py adder.tm cards/
+```
+
+If you have a .tm-file that you want to convert to cards, you can similarly use the compiler:
+```
+./compiler.py adder.tm adder
+```
+This will give you a stack of cards for the adder.tm program in the adder director, which will be created for you
+
+The .tm file can have comments starting with a #-sign and empty lines with only whitespace in them
+
+Otherwise the format of a .tm-file is this:
+```
+cardnumber:write_zero,move_zero,next_zero,write_one,move_one,next_one
+```
+
+For instance, the one card busy beaver would look like this:
+```
+# This is a comment, blank lines ar ok too, like the next line
+
+1:1,1,0,1,0,0
+````
+
diff --git a/adder.tm b/adder.tm
index 8d7a68c..582a7a1 100644
--- a/adder.tm
+++ b/adder.tm
@@ -1,22 +1,37 @@
+# Start program writes 0 at pos 0 and moves left, and jumps to 11, everything from here to 15 inputs an 8 in the negative registry
 1:0,1,11,0,0,0
 11:0,1,12,0,0,0
 12:0,1,13,0,0,0
 13:0,1,14,0,0,0
 14:1,0,15,0,0,0
+
+# At card 15 we flip a bit at registry position -4 to indicate an 8 in the negative registry, then we jump to 140
 15:0,0,140,0,0,0
+
+# At card 21 write a one and move to 22 
 21:1,0,22,0,0,0
+
+# At card 22 write a one and jump to 210 where we start to move back to registry pos 0
 22:1,1,210,1,1,210
+
+# At 30 - 38 we keep a decrementer
 30:1,1,31,0,0,0
-31:1,1,32,0,0,0,
-32:1,1,33,0,0,0,
-33:1,1,34,0,0,0,
-34:1,1,35,0,0,0,
-35:1,1,36,0,0,0,
-36:1,1,37,0,0,0,
+31:1,1,32,0,0,0
+32:1,1,33,0,0,0
+33:1,1,34,0,0,0
+34:1,1,35,0,0,0
+35:1,1,36,0,0,0
+36:1,1,37,0,0,0
 37:1,1,38,0,0,0
 38:1,1,0,0,0,0
+
+# 140 - 142 just moves us back to registry pos 0
 140:0,0,141,1,0,141
 141:0,0,142,1,0,142
+
+# At 142 we jump to 21
 142:0,0,21,0,0,21
+
+# Here we move back to registry pos 0 and then jump to 30
 210:0,1,211,1,1,211
 211:0,1,30,1,1,30
diff --git a/compiler.py b/compiler.py
index 47795bd..7532989 100755
--- a/compiler.py
+++ b/compiler.py
@@ -2,30 +2,33 @@
 
 import sys
 import os
+import re
 
 filename = sys.argv[1]
 dirname = sys.argv[2]
 os.mkdir(dirname)
 
-# print("Card number: " + cardnumber + ", write zero: " + write_zero + ", move zero: " + move_zero + ", next zero: " + next_zero + ", write one: " + write_one + ", move one: " + move_one + ", next one: " + next_one )
+regex = re.compile('^[#\s]')
+
 with open(filename, 'r') as ip:
     for line in ip:
-        arr1 = line.split(':')
-        arr2 = arr1[1].split(',')
-        cardnumber = arr1[0]
-        write_zero = arr2[0]
-        move_zero = arr2[1]
-        next_zero = arr2[2]
-        write_one = arr2[3]
-        move_one = arr2[4]
-        next_one = arr2[5]
+        if not regex.match(line):
+            arr1 = line.split(':')
+            arr2 = arr1[1].split(',')
+            cardnumber = arr1[0]
+            write_zero = arr2[0]
+            move_zero = arr2[1]
+            next_zero = arr2[2]
+            write_one = arr2[3]
+            move_one = arr2[4]
+            next_one = arr2[5]
         
 
-        with open(dirname + "/" + cardnumber, 'a') as op:
-            op.write(write_zero + '\n')
-            op.write(move_zero + '\n')
-            op.write(next_zero + '\n')
-            op.write(write_one + '\n')
-            op.write(move_one + '\n')
-            op.write(next_one + '\n')
+            with open(dirname + "/" + cardnumber, 'a') as op:
+                op.write(write_zero + '\n')
+                op.write(move_zero + '\n')
+                op.write(next_zero + '\n')
+                op.write(write_one + '\n')
+                op.write(move_one + '\n')
+                op.write(next_one)