We are going to change this sketch, so, the first thing you need to do is save your own copy that you can change however you like.
From the File menu on the Arduino IDE select the option 'Save As..' and then save the sketch with the name 'MyBlink'.
This guide was first published on Nov 28, 2012. It was last updated on Nov 28, 2012.
This page (Saving a Copy of 'Blink') was last updated on May 05, 2021.
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