Drag and Drop Variables
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I have built a "machine" interaction that presents feedback based on the user's selection of two items (one circle and one square) that are dragged into the machine for "processing." Each pairing of circle/square generates a unique response. Whenever a shape is dragged onto its target, that shape's variable is set to true; whenever the shape is dragged back to its "home" area, its variable is set to false.
I want to prevent
the user from being able to drag more than one circle or more than one square
to the targets in the machine, without making this interaction into a quiz question. Is there a way to do this? (I've tried a trigger that checks to see if certain variables are set to "true" at the same time, and displaying a message when that is the case, but that has worked only erratically. I had these error-checking triggers at the top of the stacking order on the "Interpret" button. I've removed them because they didn't seem to work.)
My file is attached. Instructions for using the machine are in the audio or on the Notes tab. I'm grateful for any ideas!