clearArea

--Clear Area Program--

home = "top"
atX = 0
atZ = 0
atY = 0
args = {...}

    --Insert Config Size Code here
length = 2
width = 2
height = 1

-- Basic movement functions to prevent sand/gravel from getting in the way
function dig()
  while turtle.detect() do
    turtle.dig()
    sleep(.1)
  end
end

function digUp()
  while turtle.detect() do
    turtle.digUp()
    sleep(.1)
  end
end

function forward()
  while not turtle.forward() do
    turtle.dig()
    sleep(.1)
  end
end

function line(distance) -- Turtle mines in straight line based on length
  local x=0
  while x<distance do
    forward()
    x=x+1
  end
end

--End of movement functions

function continue() -- Figures out turtle's top/bottom location and moves him to new column in loop if he is supposed to
  if home == "top" then
    turtle.turnRight()
    forward()
    turtle.turnRight()
    atX = atX +1

  elseif home == "bottom" then
    turtle.turnLeft()
    forward()
    turtle.turnLeft()
    atX = atX +1

  else
    print("Neither top nor bottom were part of gohome counted here...ERROR!")
  end
end

function gohome() -- On completion of layer, returns to starting position.
  print("Coming home!")
  if home == "top" then
    turtle.turnLeft()
    turtle.turnLeft()
    line(length-1)
    turtle.turnRight()
    line(width-1)
  elseif home == "bottom" then
    turtle.turnRight()
    line(width-1)
  else
    print("ERROR with HOME RETURN!")
  end
  turtle.turnRight()
end

function init()
  print("Clearing area...")
  forward()
  local x=1
  local y=0

  while y ~= height do
    x = 0
    while x ~= width do
      line(length-1)
      continue()
      if home == "top" then
        home = "bottom"
      elseif home == "bottom" then
        home = "top"
      end
      x=x+1
    end
  --  gohome()
    y=y+1
    if y ~= height then
      digUp()
      turtle.up()
    end
  end
end

init()