worldEater

local arg = {...}
local x = tonumber(arg[1])
local y = tonumber(arg[2])
local poop = 0

function clearScreen()
  term.clear()
  term.setCursorPos(1,1)
end

function zigzag()
  if poop == 0 then
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
    turtle.digDown()
    poop = 1
  elseif poop == 1 then
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    turtle.digDown()
    poop = 0
  else
    print("dig() error!")
  end
end

function dig()
  local myX, myY
  for myY = 1, y do
    for myX=1, x do
      clearScreen()
      print(turtle.getFuelLevel())
      turtle.forward()
      turtle.digDown()
      if turtle.getItemCount(14) >= 1 then
        unloadItems()
      end
    end
    print("attempting zigzag")
    zigzag() -- Zigs and Zags
  end
end

function readyCheck() -- Returns true if a chest is found in inventory slot 16.
  local chest = turtle.getItemDetail(16)
  if (chest == nil) or (chest == nil) then
    print("I'm not prepared to mine!")
    print("I need an Ender Chest in slot 16.")
    print("Press any key to continue.")
    os.pullEvent("key")
    return false
  else
    return true
  end
end

function unloadItems()
  -- Rotate turtle to Rear
  turtle.turnLeft()
  turtle.turnLeft()
  -- turtle selects ender chest
  turtle.select(16)
  -- turtle place ender chest
  turtle.place()
  -- turtle loops placing items into chest
  for i=1,14 do
    turtle.select(i)
    turtle.drop()
  end
  -- turtle selects inv for ender chest
  turtle.select(16)
  -- turtle mines
  turtle.dig()
  -- turtle faces original direction
  turtle.turnLeft()
  turtle.turnLeft()
end

-- MAIN CODE BEGINS --
print("X:",x," Y:",y)
print("poop:", poop)
readyCheck()
turtle.digDown()
dig()
while turtle.down() do
  dig()
end
-- MAIN CODE ENDS