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I'm working on an Arduino/Processing project that will read and display temperature so I thought it would be fun to use one of those paper key ring labels with a metal rim. I won't use the text on the actual image that is loaded into the processing sketch. I will probably come back a tweak it some more just for fun. It might be fun to add a string through the hole. I have never tried doing something like a string so I'm not sure how to go about doing something like that. If anyone has any suggestions or knows of any tutorials on how to do string or rope they would be most welcome.