place the element on the design screen at the very very top corner or make sure it's holding group is visible when you run the 'initialize NoSleep' workflow action.
place any clickable element on the screen
give that element an id
add 'initialize NoSleep' to your page load workflow action
feed the clickable elementid to the workflow action
voila!
you should make sure your users are aware they are clicking something that will make their screen stay on.
now serving this with only a toggle action! check it out
https://nosleepjs.bubbleapps.io/toggleit