Adv Redstone timer

rs.setOutput("back",false)
while true do
sleep(10)

rs.setOutput("back",true)
print("redstone on")
--sleep(0.5)
sleep(1)
rs.setOutput("back",false)
rs.setOutput("back",false)
rs.setOutput("back",false)
print("redstone off")
sleep(0.10)
end