PathBuilder

-- **** READ ME ****
-- Version 1.01
-- **** Purpose ****
-- Designed for path building in
-- FTB Infinity Evolved Skyblock
-- to connect the "Islands" using a turtle
-- example: 2000 blocks apart with VOID below.
--
-- **** Actions ****
-- The turtle will continue straight forward,
-- building the path as long as it has enough
-- resources in it to do another set of 4 rows.
-- 20 cobble in a stack, at least 1 torch and
-- at least enough fuel to move 20 spaces.
--
-- **** Layout ****
-- C = Cobblestone (or any place-able block)
-- T = Torch (Note only placed every 4 rows)
-- S = Starting Location
--  Side View           Top View
--   T                  TCCCC
--   C   C               S
--    CCC
--
-- **** Known bugs/inefficiencies ****
-- 1) Cobble usage needs a tweak, it leaves small
--    stacks in the slots if they are less than 20.
-- 2) Fuel consumption/usage needs a small tweak,
--    currently it consumes the whole stack in slot
--    1, instead of just enough to do a cycle
--
-- **** SETUP ****
-- Place turtle where you want the left walk way to be.
--
-- Add resources:
-- slot 1 reserved for fuel.
-- slot 2-15 reserved for cobblestone
-- slot 16 reserved for torches
--
-- **** END README ****

currentSlot = 2
rowCount = 1
run=1

function refuel()
  print("Current Fuel Level: " .. turtle.getFuelLevel())
  if turtle.getFuelLevel() < 20 then
    turtle.select(1)
    if turtle.getItemCount(1) < 20 then
      print("Need Fuel! Place fuel in slot 1, 10 minimum")
      run=0
    else
     turtle.refuel(turtle.getItemCount(1))
     print("Refueled, new level" .. turtle.getFuelLevel())
    end
  end
end

function cobbleSupplies()
  if turtle.getItemCount(currentSlot)>=20 then
    print("Current Cobblestone Level: " .. turtle.getItemCount(currentSlot))
  else
    for i = 2, 15  do
      currentSlot = i
      if turtle.getItemCount(i)>=20 then
       turtle.select(currentSlot)
       print("New Cobblestone Level: " .. turtle.getItemCount(currentSlot))
       return 0
      end
    end
  end
  if (currentSlot == 15 or turtle.getItemCount(currentSlot) <20) then
    print("Need Cobblestone in slot 2 through 15, add at least 10 a slot!")
       currentSlot = 2
       run=0
  end
end

function torches()
  print("Current Torch Level: " .. turtle.getItemCount(16))
  if turtle.getItemCount(16) < 1 then
     print("Need to add at least 1 torch, to slot 16!")
     run=0
  end
end
function gridSupplies()
  refuel()
  cobbleSupplies()
  torches()
end

function placeGrid()
  gridSupplies()
  if run == 0 then return 0 end
  turtle.select(currentSlot)

  turtle.forward()
  turtle.placeDown() -- Left path block - row 1
  turtle.turnLeft() -- Pointing Left
  turtle.place() -- Left Guide 1
  turtle.turnRight()  -- turn around
  turtle.turnRight()
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- Left path block - row 1
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- center path block - row 1
  turtle.place() -- right Guide 1
  turtle.turnLeft()

  turtle.forward()
  turtle.placeDown() -- Left path block - row 2
  turtle.turnRight()
  turtle.place() -- Right Guide 2
  turtle.turnLeft()  -- turn around
  turtle.turnLeft()
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- Left path block - row 2
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- center path block - row 2
  turtle.place() -- Left Guide 2
  turtle.turnRight()

turtle.forward()
  turtle.placeDown() -- Left path block - row 3
  turtle.turnLeft() -- Pointing Left
  turtle.place() -- Left Guide 3
  turtle.turnRight()  -- turn around
  turtle.turnRight()
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- Left path block - row 3
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- center path block - row 3
  turtle.place() -- right Guide 3
  turtle.turnLeft()

  turtle.forward()
  turtle.placeDown() -- Left path block - row 4
  turtle.turnRight()
  turtle.place() -- Right Guide 4
  turtle.turnLeft()  -- turn around
  turtle.turnLeft()
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- Left path block - row 4
  turtle.forward()  -- move one to the right
  turtle.placeDown() -- center path block - row 4
  turtle.place() -- Left Guide 4

  -- place a torch
  turtle.select(16)
  turtle.up()
  turtle.place()
  turtle.down()
  turtle.select(currentSlot)
  turtle.turnRight()
end

while run == 1 do
  placeGrid()
end