View difference between Paste ID: ZhyjRS2X and zsUVQLRg

 -- AM2 Chunk Eater Controller
 -- Save as 'startup' file.
 local f = 0
 local l = 0
 local r = 0
 local b = 0
 local default = 0
-local backvar = 0
+local back = 0
 local wait = 2
 
 function front()
  while(f<30) do
   redstone.setOutput("back", true)
   sleep(1)
   redstone.setOutput("back", false)
   f = f +1
   sleep(wait)
  end
  f = 0
 end
 
 function left()
  while(l<4) do
   redstone.setOutput("left", true)
   sleep(1)
   redstone.setOutput("left", false)
   l = l +1
   sleep(wait)
  end
  l = 0
 end
 
 function right()
  while(r<2) do
   redstone.setOutput("right", true)
   sleep(1)
   redstone.setOutput("right", false)
   r = r +1
   sleep(wait)
  end
  r = 0
 end
 
 function back()
  while(b<2) do
   redstone.setOutput("front", true)
   sleep(1)
   redstone.setOutput("front", false)
   b = b +1
   sleep(wait)
  end
  b = 0
 end
 
 while(true) do
- while(default<10) do
+ while(back<4) do
-  -- move 20 forward
+
-  front()
+
-  -- move 3 back
+  back = back + 1
  end
-  -- move 3 left
+ back = 0
-  left()
+
-  -- move 20 forward
+