Tour a mo

local sleeptime = 3.0

while do true
local iOn = redstone.getOutput("bottom")
if iOn then
while do iOn
redstone.setOutput("back", 1 )
sleep(0.1)
redstone.setOutput("back", 0 )

sleep(sleeptime)

redstone.setOutput("back", 1 )
sleep(0.1)
redstone.setOutput("back", 0 )

sleep(sleeptime)

end
end
sleep(1.0)
end