Gang mit absicherung

function forward()
  while (not turtle.forward()) do
    turtle.dig()
  end
end
function digUp()
  while (turtle.detectUp()) do
    turtle.digUp()
    sleep(0.4)
  end
end
function safe()
  turtle.turnRight()
  turtle.place()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.place()
  turtle.turnRight()
  turtle.placeDown()
end
write("Wie lang?")
l = tonumber(read())
for i = 1,l do
  safe()
  forward()
  digUp()
end