positionX = 0
positionZ = 0

fuelIndex = 7

direction = 0
function turnLeft()
  direction = direction + 1

  if direction >= 4 then
    direction = 0

  end

  turtle.turnLeft()

end

function turnRight()
  direction = direction - 1

  if direction < 0 then
    direction = 3
  end

  turtle.turnRight()

end

function Move()

  while turtle.getFuelLevel() <= 0 do
    turtle.select(1)
    turtle.refuel()
  end

  if turtle.forward() then
    if direction == 0 then
      positionX = positionX + 1
    elseif direction == 1 then
      positionZ = positionZ + 1
    elseif direction == 2 then
      positionX = positionX - 1
    elseif direction == 3 then
      positionZ = positionZ - 1
    else
	  error("Invalid operation!")
    end
  end
end

function placeSetup()
  --inv1 fuel
  --inv2 chest
  --inv3 turtle
  --inv4 diskdrive
  --inv5 disk
  --inv7-16 coalstacks

  turtle.select(2)

  turtle.placeDown()

  turnLeft()

  Move()

  turnLeft()

  turtle.select(4)
  turtle.placeDown()

  turnRight()

  turtle.select(5)
  turtle.dropDown(1)

  turnRight()
  Move()

  turnLeft()

  turtle.select(3)
  turtle.placeDown()

  turtle.select(fuelIndex)
  turtle.dropDown()

  fuelIndex = fuelIndex + 1

  turnLeft()
  Move()

  sleep(5)

  turtle.select(5)
  turtle.suckDown()

  turtle.select(4)
  turtle.digDown()

  turnRight()
  turnRight()

  Move()

  turnRight()
  Move()

  turtle.select(2)

  turtle.placeDown()

  turnLeft()

  for m = 0, 4 do

	Move()

  end
end

function headBackRow()

	turnLeft()

	for l = 0, 5 do
		Move()
	end

	turnLeft()

	while positionX ~= 0 do
		Move()
	end

	turnLeft()
	turnLeft()

end

for i = 0, 2 do
  for j = 0, 2 do
	placeSetup()

  end

  headBackRow()

end