stairs

for i=1,70 do
  turtle.digDown()
  turtle.down()
  turtle.turnRight()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnLeft()
  turtle.turnLeft()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnRight()
  turtle.select(1)
  turtle.placeDown()
  turtle.dig()
  sleep(.4)
  while turtle.detect()==true do
  turtle.dig()
  sleep(.4)
  end
  turtle.forward()
  turtle.turnRight()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnLeft()
  turtle.turnLeft()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnRight()
  turtle.digUp()
  sleep(0.4)
  while turtle.detectUp()==true do
  turtle.digUp()
  sleep(0.4)
  end
  turtle.up()
  turtle.turnRight()
  turtle.turnRight()
  if i%6==0 then
  turtle.select(2)
  turtle.place()
  end
  turtle.turnLeft()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnLeft()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnLeft()
  if turtle.detect()==false then
  turtle.select(1)
  turtle.place()
  end
  turtle.turnRight()
  turtle.down()
end