quarry

function digStripe(length)
  for xDec = 1, length - 1 do
    turtle.digDown()
    turtle.forward()
  end
  turtle.digDown()
  turtle.turnRight()
  turtle.turnRight()
  for xDec = 1, length - 1 do
    turtle.forward()
  end
  turtle.turnRight()
  turtle.turnRight()
end

function digSquare(length, width)
  for yDec = 1, width -1 do
    digStripe(length)
    turtle.turnRight()
    turtle.forward()
    turtle.turnLeft()
  end
  digStripe(length)
  turtle.turnLeft()
  for yDec = 1, width - 1 do
    turtle.forward()
  end
  turtle.turnRight()
end

function digCube(length, width, height)
  for zDec = 1, height - 1 do
    digSquare(length, width)
    turtle.down()
  end
  digSquare(length, width)
  for zDec = 1, height - 1 do
    turtle.up()
  end
end
local arg = { ... }

x = tonumber(arg[1])
y = tonumber(arg[2])
z = tonumber(arg[3])

local fuel = turtle.getFuelLevel()
local fuelNeeded = ((((x-1)*2)+1) * (y-1) * z + z - 1) / 2

--print (x..y..z)

print("Quarrying out area")
print("Dimensions:")
print("x: "..x)
print("y: "..y)
print("z: "..z)
print("")
print("Fuel: "..fuel)
print("Fuel needed: "..fuelNeeded)
print("")
if fuel < fuelNeeded then
  print("Please refuel me! I need a minimum of "..fuelNeeded.." fuel!")
else
  --Main quarry program

  digCube(x, y, z)
end

fuelReallyNeeded = fuel - turtle.getFuelLevel()

print("Fuel after quarrying: "..turtle.getFuelLevel())
print("Fuel needed: "..fuelReallyNeeded)

if fuelReallyNeeded == fuelNeeded then
  print("Fuel needed equals what I calculated!")
else
  print("Aww shit. I calculated the wrong fuel usage! :-[")
  print("Creepers may kill me")
end