How to use variables with Pause a While timing

I want to make a tool for my colleagues that they can use to play around the blink timing of LEDs on products. I can certainly do the basics of this with global properties, Loop While and Pause a While. But then the only way to change the timing is in my code, so that’s not so possible for my colleagues.

I want them to be able to change the timing values in ON and OFF text fields and then click a button to start the LED blinking (once the code has set the new timing parameters in the two Pause a While statements). But unfortunately, I can’t put a global property into the field into the Pause a While dialogue box.

Any tips or tricks for this?

Thanks,

Dave