ColorSensor (TCS3472X I2C COLOR SENSOR) Libary error???

See the save() section of https://www.espruino.com/Saving

When power is next applied, Espruino will load the information back out of flash and will resume where it left off. You can think of this a bit like 'hibernate' on a PC.

However, this means that any code that was executed at upload time will not be re-executed. For instance you may have some external hardware like an LCD display connected to Espruino - after applying power, the LCD will need to be initialised (since it can not remember its state). In this case you can create a function called onInit (or add a E.on('init', function() { ... }) listener) that is automatically called by the interpreter when it initialises.