Pathmaker.lua

local startPoint = vector.new(gps.locate()
local lastPoint = vector.new(gps.locate())
local stop = false
local light = true

function refuel()
  if(turtle.getFuelLevel() < 100) then
    turtle.select(2)
    turtle.refuel(5)
  end
end

function torch()
  turtle.select(1)
  if(turtle.getItemCount() == 1)
    stop = true
  end
  turtle.placeUp()
  light = false
end

function clear()
  local i = 3
  while i < 17 do
    turtle.select(i)
    turtle.drop()
    i = i + 1
  end
end

function arm()
  for i=1,4 do
    turtle.dig()
    turtle.forward()
  end
  turtle.dig()
end

function armExit()
  for i=1,4 do
    turtle.forward()
  end
end

function way()
  local i = 0
  if(not(startPoint.x==lastPoint.x)) then
    local length = startPoint.x - lastpoint.x
    if(length<0) then
      length = -1*length
    end
    i = length
  elseif(not(startPoint.z==lastPoint.z)) then
    local length = startPoint.z - lastPoint.z
    if(length<0) then
      length = -1*length
    end
    i = length
  end
  return i
end

function move(length)
  for i=1,length do
    turtle.forward()
  end
end

do
  coroutine.create(refuel())
  while not stop do
    for i=1,3 do
    for i=1,4 do
      turtle.dig()
      turtle.forward()
      turtle.digUp()
      if(light and i==2) then
        torch()
      elseif(i==2)
        light = true
      end
    end
    turtle.turnLeft()
    turtle.up()
    arm()
    turtle.turnRight()
    turtle.turnRight()
    armExit()
    arm()
    turtle.turnRight()
    turtle.turnRight()
    armExit()
    turtle.turnRight()
    turtle.down()
    lastPoint = vector.new(gps.locate())
    end
    turtle.turnRight()
    turtle.turnRight()
    move(way())
    clear()
    turtle.turnRight()
    turtle.turnRight()
    move(way())
  end
end