if turtle.detect()==false then
	turtle.refuel()
	turtle.forward()
	turtle.forward()
	turtle.turnRight()
	turtle.select(16)
	turtle.place()
	turtle.turnRight()
	turtle.forward()
	turtle.turnLeft()
	turtle.place()
	turtle.turnLeft()
	turtle.place()
	turtle.back()
	turtle.place()
end