pic from kidkunst.info LED cube tutorials
https://www.instructables.com/id/DIY-3x3x3-LED-Cube-for-Arduino-Nano/
Instructables 3*3*3 LED cube w/ Arduino uno
Becca's ITP Sketchbook
pic from kidkunst.info LED cube tutorials
https://www.instructables.com/id/DIY-3x3x3-LED-Cube-for-Arduino-Nano/
Instructables 3*3*3 LED cube w/ Arduino uno