I chose technology for doodling.
I used primary colour scheme in the font colours.
At the backdrop i have used a matrix type of a pattern entirely using 0's and 1's(binary code) which forms a bit. (as the whole computer system is based upon this)
I have given the colour green and black to circuits to represent a chipset base. Selection of the right font was also a rigrous task and the font which I ended to was OCR-BT. This font rightly sits what I wanted.