“Neopixels are color-changing, individually addressable (programmable) LED lights. They are available in various forms from Adafruit.com, but I am particularly fond of the 8-mm “through the hole” traditional LED style. They are bright and beautiful, and you can make your own custom designs as illustrated by the Heart shape example provided herein. Arduino software is typically used to control the LED’s.
Please see my YouTube video of the Neopixel LED Heart in light show action. Another fun way to view the Heart it is to point it at a window such as a sliding glass door to see a double-heart image reflection (as shown).”