Hello all - I'm very, very new to this, so please forgive me

I need to toggle an output @ 2hz (250ms High / 250ms Low etc), when a specific action has been performed, blinking an LED as a visual indicator.

The PULSOUT command stalls the program routine and for it's entire duration, in in my case, I'd be using a looped PULSOUT GPIO.1,250000

Is there a way to toggle an output for a fixed ON/OFF period, whilst the program can continue to run, monitoring inputs etc ?

Many thanks