This is a fairly simple Arduino project to make a frame with an 8 x 15 3 colour LED matrix inside
The matrix is currently programmed to display some simple Christmasy themed stuff
The LEDS are WS2812B which are control circuits and SMD5050 LEDS bought as a 60LED 1m strip. Each strip is then cut into 4 15LED sections and the strips are arranged as shown below. The DI-DO from the cuts are wired in line. Also all the 5V and all the GND are wired together.
The strips are then joined to an Arduino board via the 5V, GND and Digital PIN 8