height = 0
length = 1
width = 0
fwd = true
rht = true
lft = false
inair = 0
retrn1 = false
retrn2 = false
on = true
drction = 3
turnn = false

function chopUp()
  turtle.digUp()
  turtle.up()
  height = height + 1
    if turtle.detectUp == false then
      inair = 1
    end
end

function dcline()
  turtle.down()
  height = height - 1
end

function moveForward()
  turtle.dig()
  turtle.forward()
  turtle.dig()
  turtle.forward()
  turtle.dig()
  turtle.forward()
    if turtle.detectDown()== false then
        turtle.placeDown()
    end
  length= length + drction
end

function nextRowLeft()
  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  turtle.dig()
  turtle.forward()
  turtle.dig()
  turtle.forward()
  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  length = length + 1
  width = width + 3
  drction = 3
  turnn = false
end

function nextRowRight()
  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.dig()
  turtle.forward()
  turtle.dig()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()
  length = length - 1
  width = width + 3
  drction = -3
end

turtle.select(1)

while on == true do
if height == 0 then
  moveForward()
elseif
height ~=0 then
turtle.down()
height = height - 1
end

while turtle.detectUp()== true do
  turtle.digDown()
  turtle.placeDown()
  chopUp()
end

if height == 0 then
  inair = 0
end

while inair == 1 do
  dcline()
end

while length == 22 do
  nextRowRight()
end

while turnn == true do
    nextRowLeft()
end

if width == 15 then
    retrn1 = true
    if length == 0 then
        retrn2 = true
    end
end
if retrn1 == false then
  if length == 0 then
    turnn = true
  end
end

if retrn2 == true then
    while height ~=0 do
    turtle.down()
    height = height - 1
    end
    if height == 0 then
    turtle.dig()
    turtle.forward()
    length = length - 1
    turtle.turnRight()
        while turtle.getFuelLevel() < 500 do
            turtle.select(15)
            turtle.suckDown()
            sleep(10)
            turtle.refuel()
        end
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.select(2)
    turtle.dropDown(turtle.getItemCount(2))
    turtle.select(3)
    turtle.dropDown(turtle.getItemCount(3))
    turtle.select(4)
    turtle.dropDown(turtle.getItemCount(4))
    turtle.select(5)
    turtle.dropDown(turtle.getItemCount(5))
    turtle.select(6)
    turtle.dropDown(turtle.getItemCount(6))
    turtle.select(7)
    turtle.dropDown(turtle.getItemCount(7))
    turtle.select(8)
    turtle.dropDown(turtle.getItemCount(8))
    turtle.select(9)
    turtle.dropDown(turtle.getItemCount(9))
    turtle.select(10)
    turtle.dropDown(turtle.getItemCount(10))
    turtle.select(11)
    turtle.dropDown(turtle.getItemCount(11))
    turtle.select(12)
    turtle.dropDown(turtle.getItemCount(12))
    turtle.select(13)
    turtle.dropDown(turtle.getItemCount(13))
    turtle.select(14)
    turtle.dropDown(turtle.getItemCount(14))
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.select(1)
    turtle.suckDown(turtle.getItemSpace(1))
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.dig()
    turtle.forward()
    width = width - 1
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    length = length + 1
    turtle.dig()
    turtle.forward()
    length = length + 1
    drction = 1
    retrn1 = false
    retrn2 = false
    end
end

end