Ender Quarry v1

fuelChestLocation = 1
fuelLocation = 2
fenceChestLocation = 5
fenceLocation = 6
miningChestLocation = 9
endQuarryLocation = 10
trashLocation = 16

function layFence(size)
  for i = 1,size do
    if (turtle.getFuelLevel() <= 1) then -- check if fuel is low
      getFuel() -- cal function load fuel
    end
    if (turtle.detectDown()) then -- Verify area below is clear
      turtle.select(trashLocation) -- select position for trash
      turtle.digDown() -- clear space for fence
      turtle.drop() -- clear trash
    end
    if (turtle.getItemCount(fenceLocation) <= 0) then -- check if fences are loaded
      getFences() -- call function to load fences
    end
    turtle.select(fenceLocation) -- select position of fences
    turtle.placeDown() -- place fence
    turtle.select(trashLocation)
    turtle.dig() -- clear space forward
    turtle.drop() -- clear trash
    turtle.forward() -- move forward
  end
end

function removeFence(size)
  for i = 1,size do
    if (turtle.getFuelLevel() <= 1) then -- check if fuel is low
      getFuel() -- cal function load fuel
    end

    if (turtle.getItemCount(fenceLocation) > 63) then
      turtle.select(miningChestLocation)
      turtle.placeUp() -- place ender chest
      turtle.select(fenceLocation) -- select position where fences are being placed
      turtle.dropUp(64) -- push stack of fences into above inventory
      turtle.select(miningChestLocation) -- select position where fence chest is to be stored
      turtle.digUp() -- grab fence chest
    end

    turtle.select(fenceLocation) -- select position of fences
    turtle.digDown() -- pickup fence
    turtle.forward() -- move forward
  end
end

function getFuel()
  if turtle.detectUp() then -- verify space above is clear
    turtle.select(trashLocation) -- select position for trash
    turtle.digUp() -- clear space for Ender chest
    turtle.drop() -- clear trash
  end
  turtle.select(fuelChestLocation) -- select position where Ender chest is located that contains fuel
  turtle.placeUp() -- place ender chest
  turtle.select(fuelLocation) -- select position where fuel is to be kept
  turtle.suckUp() -- grab a stack of fuel
  turtle.refuel(64) -- refuel
  turtle.select(fuelChestLocation) -- return to position for storing ender chest
  turtle.digUp() -- retrieve Ender chest
end

function getFences()
  if turtle.detectUp() then -- verify space above is clear
    turtle.select(trashLocation) -- select position for trash
    turtle.digUp() -- clear space for Ender chest
    turtle.drop() -- clear trash
  end
  turtle.select(fenceChestLocation) -- select position where Ender chest is located that contains fences
  turtle.placeUp() -- place Ender chest
  turtle.select(fenceLocation) -- select position where fences is to be kept
  turtle.suckUp()  -- grab a stack of fences
  turtle.select(fenceChestLocation) -- return to position for storing ender chest
  turtle.digUp() -- retrieve Ender chest
end


print("What would you like to do? Make a selection:")
print("  1 - Place Ender Quarry")
print("  2 - Pickup Ender Quarry")
write("Choice: ")
local input = read()
write("What size? ")
local size = read()

if (input == "1") then
  for i = 1,4 do
    layFence(size)
    turtle.turnLeft()
  end
  turtle.select(fenceLocation) -- select position where fences are being placed
  turtle.digDown()
  turtle.select(endQuarryLocation)
  turtle.placeDown()
  turtle.up()
  turtle.select(miningChestLocation)
  turtle.placeDown()
  turtle.select(fenceLocation)
  turtle.dropDown()
elseif (input == "2") then
  turtle.select(miningChestLocation)
  turtle.digDown()
  turtle.down()
  turtle.select(endQuarryLocation)
  turtle.digDown()
  for i = 1,4 do
    removeFence(size)
    turtle.turnLeft()
  end
end