Tommy: I do one mistake, you can select the yellow rectangular pin ("pata" in Spanish) with shift click (Not yellow button. I think in a possibility of change the gate , but not do the code. That is why not exist "cambiar". Clicking on the switch send messages to a wire ("Cable" in Spanish ) attach to it, to all pins "pata" connected to wire, etc. Gates change by stepping methods, maybe could have sense method and variables to different response times ?. I do the project as exercise, but if is useful could extend it. What are you wish list for it ?
Cheers. Edgar
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