diff --git a/codes/counter.asm b/codes/counter.asm
deleted file mode 100644
index 9e4443e..0000000
--- a/codes/counter.asm
+++ /dev/null
@@ -1,8 +0,0 @@
-define:
-    0 [ABC][DE]
-    1 [AB][CDE]
-
-data:
-    0001111
-
-instructions:
diff --git a/codes/inc.asm b/codes/inc.asm
new file mode 100644
index 0000000..9371671
--- /dev/null
+++ b/codes/inc.asm
@@ -0,0 +1,42 @@
+#
+# 1 2 3 4 5 6 7 8
+# A B C D E F G H
+#
+
+define:
+    0 [ABC][DE]
+    1 [AB][CDE]
+
+data:
+    1011{FT} # {FT} is TUE BINDING hold
+
+instructions:
+    # mark last if is 1 if exist and replace this and open base C
+    #
+    #                                               /
+    # - > - - > - - > - > - > - - > - >   - - - - /  
+    # | | | | | | | | | | | | | | | | |   | | | | |  
+    # - - - - - - - - - - - - - - - - - - - - - - -  
+    # A B C D E A B C D E A B C D E A B C D E A B C  
+    #
+    # if next bit is 1 it again replace this and open base C this is chain reaction
+    #
+    {D*E*F*T*G*}   {D*E*A*B*C*H*}
+
+    # remove all markers
+    {DEFTG}        {DEABCH}
+
+    # set 1 end this unvrap last 0
+    {C*D*E*}
+
+    # shift 1 end to center of register cell if possible to by eble of unvrap by 0
+    {B*C*D*}
+
+    # set 0
+    {ABC} {DE}
+
+    # remove last 0
+    {ABC}
+
+    # set last 0 to 1
+    {A*B*}
\ No newline at end of file
diff --git a/src/SIMDDNA/register.py b/src/SIMDDNA/register.py
index d63357a..56fa7fe 100644
--- a/src/SIMDDNA/register.py
+++ b/src/SIMDDNA/register.py
@@ -26,28 +26,33 @@ class Register:
     # @param mol molecule reprezenting register
     #
     def instruction(self, IMols):
-        for mol in IMols:
-            # try bind mol to all possible bindings
-            self.doAllBinding(mol)
+        # @todo: while chainging
+        for _ in range(20):
+            for mol in IMols:
+                # try bind mol to all possible bindings
+                self.doAllBinding(mol)
 
-            # remove unbinded chains from register (because new imol have bind on older chain with more bases that register)
-            # ---
-            # |||
-            # ---
-            #
-            # ---- R
-            self.removeUnbinded()
+            for mol in IMols:
+                # remove unbinded chains from register (because new imol have bind on older chain with more bases that register)
+                # ---
+                # |||
+                # ---
+                #
+                # ---- R
+                self.removeUnbinded()
 
-            # remove unbinded chains from register (because new imol have bind on more posisin on register that older)
-            # --
-            #
-            # ---
-            # |||
-            # ---- R
-            self.removeReplaced()
+            for mol in IMols:
+                # remove unbinded chains from register (because new imol have bind on more posisin on register that older)
+                # --
+                #
+                # ---
+                # |||
+                # ---- R
+                self.removeReplaced()
 
-            # remove all unstable binded chains binded on 1 base or lower
-            self.removeUnstable()
+            for mol in IMols:
+                # remove all unstable binded chains binded on 1 base or lower
+                self.removeUnstable()
         
     ##
     # remove unbinded chains from register (because new imol have bind on more posisin on register that older)