Pause until key press?

I think your question has been answered in the above posts, particularly:

As clearly stated by @peternlewis:

But I think you are making this unduly hard on yourself. Why not just wait for a large, easy to reach key is pressed? Oh yeah, we have one. The SPACEBAR:

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The SHIFT key is also a favorite, so you could add it:

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Of course, you could just keep adding The key conditions until you have all of them entered, but what mess. :wink: