--=======================================Standard Lbrary=====================================--
function smartFuel()
    if turtle.getFuelLevel() <= 0 then
        onSlot = turtle.getSelectedSlot()
        while not turtle.refuel(1) do

            onSlot = onSlot + 1
            if onSlot == 17 then
              onSlot = 1
            end
            turtle.select(onSlot)
        end
    end
end

function smartFor()
    while not turtle.forward() do
        turtle.attack()
        turtle.dig()
        smartFuel()
    end
end

function smartUp()
    while not turtle.up() do
        turtle.attackUp()
        turtle.digUp()
        smartFuel()
    end
end

function smartDown()
    while not turtle.down() do
        turtle.attackDown()
        turtle.digDown()
        smartFuel()
    end
end

function smartMove(dir)
    if dir == -1 then
        turtle.turnLeft()
        smartFor()
    elseif dir == 1 then
        turtle.turnRight()
        smartFor()
    elseif dir == 2 then
        smartFor()
    elseif dir == -2 then
        turtle.turnRight()
        turtle.turnRight()
        smartFor()
    elseif dir == 3 then
        smartUp()
    elseif dir == -3 then
        smartDown()
    end
end
--=======================================CoodLibrary==========================-
--start with "initCoords
--====initCoords=====--
function initCoords()
x = 0
y = 0
z = 0
--0 is forwards, 1 is left, goes clockwise to 3
facing = 0

--used to remember location before returning to origin
tempX = 0
tempY = 0
tempZ = 0
tempFacing = 0
end

function trackedFor()
smartFor()
if facing == 0 then
	y = y+1
elseif facing == 1 then
	x = x+1
elseif facing == 2 then
	y = y-1
elseif facing == 3 then
	x = x-1
end
end

function trackedUp()
smartUp()
z = z+1
end

function trackedDown()
smartDown()
z = z-1
end

function trackedRight()
changeFacing(1)
turtle.turnRight()
end

function trackedLeft()
changeFacing(-1)
turtle.turnLeft()
end
function trackedMove(dir)
	if dir == -1 then
        trackedLeft()
        trackedFor()
    elseif dir == 1 then
        trackedRight()
        trackedFor()
    elseif dir == 2 then
        trackedFor()
    elseif dir == -2 then
        trackedRight()
        trackedRight()
        trackedFor()
    elseif dir == 3 then
        trackedUp()
    elseif dir == -3 then
        trackedDown()
	end
end

function changeFacing(change)
	facing = facing + change
	facing = facing % 4
end

function face(targetFacing)
	while facing ~= targetFacing do
		turtle.turnRight()
		changeFacing(1)

	end
end

function toCoords(tarX,tarY,tarZ,tarFace)


if z > tarZ then
	for i=tarZ+1,z do
		trackedMove(-3)
	end
elseif z < tarZ  then
	for i=z,tarZ-1 do
		trackedMove(3)
	end
end

if y > tarY then
	face(2)
	for i=tarY+1,y do
		trackedMove(2)
	end
elseif y < tarY then
	face(0)
	for i=y,tarY-1 do
		trackedMove(2)
	end
end

if x > tarX then
	face(3)
	for i=tarX+1,x do
		trackedMove(2)
	end
elseif x < tarX then
	face(1)
	for i=x,tarX-1 do
		trackedMove(2)
	end
end

face(tarFace)

end

function saveCoords()
tempX = x
tempY = y
tempZ = z
tempFacing = facing
end

function toSavedCoords()
toCoords(tempX,tempY,tempZ,tempFacing)
end

--============================Function Start=============================--
initCoords()
toCoords(2,2,2,0)
saveCoords()
toCoords(0,0,0,0)
toSavedCoords()
print(x .. " " .. y .. " " .. z .. " " ..facing)