GreenHouse

--This program builds a house
slot=1
for height = 1, 5 do
  turtle.up()
  for side = 1, 4 do
    -- begin side of house
    for size = 1, 4 do
      -- lay down wall layer 1
      turtle.placeDown()
      if turtle.getItemCount(slot)==0 then
      -- this code changes inventory slots if current slot is empty
          slot= slot+1
          turtle.select(slot)
      end
      turtle.forward()
    end
    turtle.turnLeft()
  end
end