A complete FREE tutorial on :

Developing PebbleBot
using the open-source Arduino UNO

PebbleBot is an Arduino based robotic car, which can use candies (coloured tablets) to write a Name, in a given font and preferred colours. It can write in any language if the binary font file is provided, as described in the video.
Font File font_5x8_meghna.h 14KB
Utility File: 8-bit Binary to Decimal Converter
For PC based "old" C/C++ Compilers (IDEs like Turbo_C) which do not allow the use of constants like B00001111 and only supports dec/hex based declairation like 15/0x0f
bin2dec.h 10KB