Quarry with Enderchest WIP

local width = {...}
local length = {...}
local distance = 0
local storage = 0
local row = 0
local direction = 'right'
local chest = 16

function dig()
  for x = 1, length do
    turtle.dig()
    turtle.digDown()
    turtle.forward()
    distance = distance + 1
    storage = storage + 1
    dump()
  end
end

function turn()
  if distance == width then
    if direction == 'right' then
      turtle.turnRight()
      turtle.digDown()
      turtle.dig()
      turtle.forward()
      turtle.turnRight()
      turtle.digDown()
      direction = 'left'
    else
      turtle.turnLeft()
      turtle.digDown()
      turtle.dig()
      turtle.forward()
      turtle.turnLeft()
      turtle.digDown()
      direction = 'right'
    end
  end
  row = row + 1
  distance = 0
end

function dump()
  if storage == 50 then
    drop()
    storage = 0
  end
end

function drop()
  turtle.select(chest)
  turtle.placeUp()
  for 1 = 1,15 do
    turtle.select(i)
    turtle.dropUp()
  end
end

function down()
  if row == length do
    if direction == 'right' do
      turtle.turnRight()
      turtle.turnRight()
      turtle.digDown()
      turtle.down()
      direction = 'left'
    else
      turtle.turnLeft()
      turtle.turnLeft()
      turtle.digDown()
      turtle.down()
      direction = 'right'
    end
  end
end


-------------
while true do
  dig()
  dump()
  turn()
  dump()
  down()
  dump()
end