testmovement

local x = 1
local y = 1
local z = 1


local function backD(distance)
    turtle.turnLeft()
    turtle.turnLeft()
    for i=1,distance do
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
        z = z - 1
    end
    turtle.turnLeft()
    turtle.turnLeft()
end

local function rightD(distance)
    turtle.turnRight()
    for i=1,distance do
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
        x = x - 1
    end
    turtle.turnLeft()
end

local function leftD(distance)
    turtle.turnLeft()
    for i=1,distance do
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
        x = x + 1
    end
    turtle.turnRight()
end

local function forwardD(distance)
    for i=1,distance do
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
        z = z + 1
    end
end

local function downD(distance)
    for i=1,distance do
        if turtle.detectDown() then
            turtle.digDown()
        end
        y = y - 1
        turtle.down()
    end
end

local function upD(distance)
    for i=1,distance do
        if turtle.detectUp() then
            turtle.digUp()
        end
        y = y + 1
        turtle.up()
    end
end




local xoff = 1
local yoff = 1
local zoff = 1

local movingForward = true
local movingLeft = false

while true do
-- navigation sysstem

-- this number must be even for this to work
if zoff == 4 then
    if movingForward then
        movingForward = false
        movingLeft = true
        zoff = 1
        rightD(3)
        forwardD(1)
    else
        movingForward = true
        movingLeft = false
        zoff = 1
        rightD(3)
        backD(1)
    end
    xoff = xoff + 1
else

    if movingLeft then
        leftD(1)
    else
        rightD(1)
    end

    if movingForward then
        forwardD(2)
    else
        backD(2)
    end

    if movingLeft then
        movingLeft = false
    else
        movingLeft = true
    end

    zoff = zoff + 1
end

turtle.digDown()
end