function packageDown(amount)
	rs.setOutput("back", true)

	repeat
		while turtle.getItemCount() > amount do
			turtle.drop(amount)
			sleep(0.7)
		end
		turtle.dropUp()
	until turtle.getItemCount() == 0
	rs.setOutput("back", false)
end

while true do
	packageDown(9)
	sleep(60)
end