You can build your own MERRY XMAS sign for the Christmas eve using digital logic ICs (74HC595 and 74HC14 ). You can also add the flashing LEDs around the edges of the sign to make it look more attractive. You’ll be requiring 134 LEDs of 5mm for representing the sign – ‘MERRY XMAS’. 24 extra LEDs (8 Red, 8 Yellow, and 8 Green) can be used to create a flashing border around the edges of the sign in the fashion shown here.
You can refer to the post shared by Embedded-lab member here for step-by-step build process, circuit schematics, and circuit operation.