View difference between Paste ID: Je78xjeE and 7kHR2hiY

 -- @param pulse length in seconds
 local pulseLength = 0.5
 
 -- @param clock speed in seconds
 local clockSpeed = 2
 
 -- @param pulse direction
 local pulseSide = "right"
 local inputSide = "front"
 
 -- @param redstone signal to disable clock
 -- true = redstone turns on
 -- false = redstone turns off
 -- nil = ignore redstone
 local redstone = nil
 
 while true do
   term.clear()
   print("Clock running, output " .. pulseSide .. "...")
   print("T " .. pulseLength .. " / C " .. clockSpeed)
 
   -- use redstone signal to determine if the clock is on or off
   while redstone ~= rs.getInput(inputSide) do
     rs.setOutput(pulseSide, true)
     sleep(pulseLength)
 
     rs.setOutput(pulseSide, false)
     sleep(clockSpeed - pulseLength)
   end
 
   -- if we dropped out of the clock loop, wait for redstone
   print("")
   print("OFF (Waiting for redstone)")
   event = os.pullEvent("redstone")
 end