Certus Bloc Purifier

function main()
	while true do
		-- Chute of certus bloc
		redstone.setOutput("back", false)
		os.sleep(0.2)
		redstone.setOutput("back", true)
		os.sleep(0.3)

		-- Chute of charged certus
		redstone.setOutput("right", false)
		os.sleep(0.2)
		redstone.setOutput("right", true)

		-- Recuperation of purified bloc
		os.sleep(8)
		redstone.setOutput("left", false)
		os.sleep(2)
		redstone.setOutput("left", true)
		os.sleep(8)
	end
end

redstone.setOutput("right", true)
redstone.setOutput("left", true)
redstone.setOutput("back", true)
os.sleep(5)
main()