View difference between Paste ID: bsnnwdkt and Vi7xwA6H

 args = {...}
 local start = tonumber(args[1])
 local steps = tonumber(args[2])
 local depth = tonumber(args[3])
 local width = tonumber(args[4])
 
-local consume = steps * depth * width
+local consume = steps * (depth + width) * 2
-if turtle.getFuelLevel() <= consume then
+if turtle.getFuelLevel() < consume then
   turtle.select(1)
   turtle.refuel(math.floor(consume/80)+1)
 end
 local fuel = turtle.getFuelLevel()
 print("fuel:"..tostring(fuel))
 
 local function GetBlocks(z)
   for i=1,z do
     turtle.down()
   end
   turtle.turnLeft()
   for i=1,3 do
     turtle.forward()
   end
   turtle.turnRight()
   turtle.suck()
   turtle.turnLeft()
   for i=1,3 do
     turtle.back()
   end
   turtle.turnRight()
   for i=1,z do
     turtle.up()
   end
 end
 
 local function PutLine(wl)
   for i=1, tonumber(wl) do
     if not turtle.detectDown() then
       print("place")
       turtle.placeDown()
     else
       print("skip")
     end
     turtle.forward()
   end
 end
 
 local function MakeWall(d, w)
   PutLine(d)
   turtle.turnRight()
   PutLine(w)
   turtle.turnRight()
   PutLine(d)
   turtle.turnRight()
   PutLine(w)
   turtle.turnRight()
 end
 
 local cz = 0
 turtle.select(2)
-for i=1,start do
+for i=1,start-1 do
   turtle.up()
   cz = cz + 1
 end
 for i=1,steps do
   if turtle.getItemCount() < (depth + width) * 2 then
     GetBlocks(cz)
   end
   turtle.up()
-  GetBlocks(cz)
+
   turtle.forward()
-for i=1,start do
+
   turtle.back()
-  cz = cz - 1
+
 for i=1,cz do
-
+
 end