View difference between Paste ID: E98CYMQV and SNXdXJmZ

 local tArgs = { ... }
 
-if #tArgs ~= 2 then
+if #tArgs == 0 then
-        print( "Usage: stairs <depth>, <length>" )
+        print( "Usage: wallup <length> [depth] " )
         return
 end
 
-local depth = tonumber( tArgs[1] )
+local length = tonumber( tArgs[1] )
-if depth < 1 then
+if length < 2 then
-        print( "stair depth must be positive" )
+        print( "wall length must be > 2" )
         return
 end
 
-local length = tonumber( tArgs[2] )
+local depth = 256
-if length < 1 then
+if #tArgs >= 2 then
-        print( "stair length must be positive" )
+  depth = tonumber( tArgs[2] )
   if depth < 1 then
         print( "wall depth must be positive" )
         return
   end
 end
 
 local function digForward()
   while (turtle.detect()) do
     turtle.dig()
     sleep(0.2)
   end
 end
 
 local function digUp()
   while (turtle.detectUp()) do
     turtle.digUp()
     sleep(0.2)
-turtle.select(16)
+
-local requiredFuel = (depth*2 / 80) + 1
+
-if (requiredFuel < turtle.getFuelLevel()) then
+
-  turtle.refuel()
+
 local relY = 0
 
-local fuelLevel = turtle.getFuelLevel()
+local function tryDown()
-print("Fuel level: "..fuelLevel)
+  if (turtle.detectDown()) then
-if fuelLevel < 1 then
+     turtle.digDown()
- return
+
 
   if (turtle.detectDown()) then
-print("stairs "..depth.." x "..length)
+    return false
   end
-local curDepth = 0
+  if (turtle.down()) then
     relY = relY-1
     return true
-while (curDepth < depth) do
+  else
-  for i=1,length do
+    return false
-    digForward()
+
-    turtle.forward()
+
-    turtle.digDown()
+
-    digUp()
+
-    turtle.down()
+local function tryUp()
-    if (not turtle.detectDown()) then
+
-      turtle.placeDown()
+     turtle.digUp()
-    else
+
-      if (not turtle.compareDown()) then
+  if (turtle.up()) then
-        turtle.digDown()
+    relY = relY + 1
-        turtle.placeDown()
+    return true
   else
     return false
-
+
-    curDepth = curDepth + 1
+
-    if (curDepth == depth) then
+
-      return
+local function suckAll()
   while turtle.suck() do
   end
-  turtle.turnRight()
+
 
 local function wallLayer()
-turtle.turnRight()
+  for side=1,4 do
-turtle.turnRight()
+    for i=1,(length) do
       turtle.turnLeft()
-curDepth = 0
+      suckAll()
-while (curDepth < depth) do
+      if not turtle.compare() then
-  for i=1,length do
+        digForward()
-    turtle.up()
+        suckAll()
-    turtle.forward()
+        turtle.place()
       end
-    curDepth = curDepth + 1
+      turtle.turnRight()
-    if (curDepth == depth) then
+      if i< length then
-      return
+        digForward()
         turtle.forward()
       end
-  turtle.turnLeft()
+
-end
+    turtle.turnRight()
   end
 end
 
 local function returnToTop()
   while relY < 0 do
     local canUp = tryUp()
     if not canUp then
       break
     end
   end
 end
 
 turtle.select(1)
 for curDepth=1,depth do
   wallLayer()
   if curDepth < depth then
     local canDown = tryDown()
     if not canDown then
       break
     end
   end
 end
 returnToTop()