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I am working on a science project with my son that involves generating a force as a function of time plot. My idea is to modify the LittleBits EtchAsketch code for this purpose. Accordingly, I would like to know how I could modify the EtchAsketch processing code to measure time along the x-axis. Moreover, I would like to show the numerical values on the vertical and horizontal axes and keep the measured signal. The LittleBits Arduino is based on the Lenoardo board. Any help is welcome. Thanks!