params = {...}

floorLength = tonumber(params[1])
floorWidth = tonumber(params[2])

currentSlot = 1


turnRight = true

function gotoNextSlotIfEmpty()
  if turtle.getItemCount(currentSlot) == 0 then
    currentSlot = currentSlot + 1
    turtle.select(currentSlot)
  end
end

turtle.select(currentSlot)
turtle.up()

for width = 1, floorWidth>=width do

  for length = 1, floorLength>=length do

    turtle.placeDown()
    gotoNextSlotIfEmpty()
    if length ~= floorLength then
      turtle.forward()
    end

  end

  if turnRight then
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
  else
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
  end
  turnRight = not turnRight

end