run.lua

require "robot"

Z = 0

MINING_FLOOR = -64

ROBOT = Robot.new(0,0,Z)

DISTANCE_DOWN = 0 - Z - MINING_FLOOR

ROBOT.checkInventory()

if turtle.getFuelLevel() < 1 and not ROBOT.refuel() then
    print("No fuel")
end

ROBOT.downMany(DISTANCE_DOWN)

ROBOT.forwardMany(64, true)

X,Y,Z,O = ROBOT.getLocation()
while turtle.getFuelLevel() < (math.abs(X) + math.abs(Y) + math.abs(Z) + BUFFER) do
    ROBOT.left()
    ROBOT.forwardOne(true)
    ROBOT.left()

    local StepsForward = math.abs(ROBOT.getForwardCoordinate())
    ROBOT.forwardMany(StepsForward, true)


    BUFFER = 100
    X,Y,Z,O = ROBOT.getLocation()
end

if X < 0 then
    ROBOT.turnTo(1)
    ROBOT.forwardMany(math.abs(X))
end

if X > 0 then
    ROBOT.turnTo(3)
    ROBOT.forwardMany(math.abs(X))
end

if Y < 0 then
    ROBOT.turnTo(2)
    ROBOT.forwardMany(math.abs(Y))
end

if Y > 0 then
    ROBOT.turnTo(4)
    ROBOT.forwardMany(math.abs(Y))
end

X,Y,Z,O = ROBOT.getLocation()

if X ~= 0 then
    print("Not at X=0")
end

if Y ~= 0 then
    print("Not at Y=0")
end

ROBOT.upMany(math.abs(Z))