Farm

local tArgs = {...}
forward = tArgs[1] - 1
across = tArgs[2]
direction = tArgs[3]

function move()
    while not turtle.forward() do
        turtle.attack()
        turtle.dig()
    end
end

function dig()
  if turtle.detectDown() then
    turtle.digDown()
    turtle.placeDown()
  end
end

function changeDirection()
    if(direction == "right") then
    direction = "left"
  else
    direction = "right"
  end
end

function mineForward(length)
    for x = 0, length do
        dig()
        if(x < tonumber(length)) then
            move()
        end
    end
end

function turn()
  if(direction == "right") then
    turtle.turnRight()
  else
    turtle.turnLeft()
  end
end

function nextRow()
    turn()
    mineForward(1)
    turn()
    changeDirection()
end

function unload()
  for i = 2, 16 do
    turtle.select(i)
    turtle.dropUp()
  end
  turtle.select(1)
end

function goHome()
  for i = 1, forward do
    move()
  end
  turtle.turnRight()
  for i = 1, forward do
    move()
  end
  turtle.turnRight()
end
function main()
        for y = 1, across do
            mineForward(forward)
            if(y < tonumber(across)) then
                nextRow()
   else
     turn()
     turn()
            end
        end
end

while true do
  main()
  goHome()
  unload()
  print("1.5 hours remaining")
  sleep(1800)
  print("1 hour remaining")
  sleep(1800)
  print("Half an hour remaining")
  sleep(1700)
  for x = 1, 10 do
    print(x.. " seconds until harvest")
    sleep(1)
  end
end