Cable Layer

startup = true

function saveDirection()
  file = fs.open("direction","w")
  file.write(direction)
  file:close()
end

if fs.exists("distance") then
  file = fs.open("distance","r")
  distance = file.readAll()
  file:close()
else
  term.clear()
  term.setCursorPos(1,1)
  print("How far do I go?")
  term.write(">")
  distance = read()
  term.clear()
  term.setCursorPos(1,1)
  print("Oh my god")
  sleep(1)
  file = fs.open("distance","w")
  file.write(distance)
  file:close()
end

if fs.exists("slot") == true then
  file = fs.open("slot","r")
  slot = file.readAll()
  file:close()
  turtle.select(tonumber(slot))
else
  turtle.select(1)
end

if fs.exists("direction") == true then
  file = fs.open("direction","r")
  direction = file.readAll()
  file:close()
else
  file = fs.open("direction","w")
  file.write(0)
  file:close()
  direction = 0
end

while tonumber(direction) ~= 0 do
  if tonumber(direction) > 0 then
    turtle.turnLeft()
    direction = direction - 1
  elseif tonumber(direction) < 0 then
    turtle.turnRight()
    direction = direction + 1
  end
  file = fs.open("direction","w")
  file.write(direction)
  file:close()
end

while tonumber(distance) > 0 do
  if startup == false then
    partner = false
    while partner == false do
      a,b = turtle.inspectDown()
      if b == "No block to inspect" then
        b = {"no","block"}
      end
      for k,v in pairs(b) do
        if v == "computercraft:CC-Turtle" then
          partner = true
        end
      sleep(.05)
      end
    end
  else
    sleep(3)
    startup = false
  end
  turtle.dig()
  sleep(.5)
  if fs.exists("placed") == false then
    turtle.forward()
    distance = distance - 1
    file = fs.open("placed","w")
    file.write("filler")
    file:close()
  end
  turtle.turnRight()
  direction = direction +1
  saveDirection()
  turtle.turnRight()
  direction = direction +1
  saveDirection()
  turtle.place()
  if turtle.getItemCount( turtle.getSelectedSlot() ) == 0 then
    turtle.select(turtle.getSelectedSlot() +1)
    slot = turtle.getSelectedSlot() +1
    file = fs.open("slot","w")
    file.write(slot)
    file:close()
  end
  fs.delete("placed")
  turtle.turnLeft()
  direction = direction -1
  saveDirection()
  turtle.turnLeft()
  direction = direction -1
  saveDirection()
  term.clear()
  term.setCursorPos(1,1)
  print(distance)
end

fs.delete("distance")
fs.delete("slot")
fs.delete("direction")
term.clear()
term.setCursorPos(1,1)
print("Job done.")