run

local position = vector.new(gps.locate(5))
local home = vector.new(-265,101,8)
local orientation = 0

local function turnleft()
  orientation = orientation - 1
  if orientation < -1 then orientation = 2 end
  turtle.turnLeft()
end

local function turnright()
  orientation = orientation + 1
  if orientation > 2 then orientation = -1 end
  turtle.turnRight()
end

local success = true
local function forward()
  if orientation == 0 then position.x = position.x - 1 end
  if orientation == 2 then position.x = position.x + 1 end
  if orientation == -1 then position.z = position.z - 1 end
  if orientation == 1 then position.z = position.z + 1 end
  success = turtle.forward()
end

local function up()
  position.y = position.y + 1
  success = turtle.up()
end

local funtion down()
  position.y = position.y - 1
  turtle.down()
end

local function gohome()
  while position.y < 120 then up() end
  while orientation < 2 then turnright() end
  while position.x < home.x then forward() end
  turnright()
  turnright()
  while position.x > home.x then forward() end
  turnright()
  while position.z < home.z then forward() end
  turnright()
  turnright()
  while position.z > home.z then forward() end
  while position.y > 101 then down() end
  turnright()
end

local temp = vector.new(gps.location(5))
local function findorient()
  temp = vector.new(gps.location(5))
  if forward then
    position = vector.new(gps.location(5))
    if position.x == temp.x then
      if position.z > temp.z then orientation = 1
      else
      orientation = -1
      end
    else
     if position.x > temp.x then orientation = 2
     else
     orientation = 0
     end
   else
   up()
   end
end

findorient()
gohome()