Alan Turing's 100th Birthday

On today's Google home page features Google's own version of the "Turing Machine". When you click on the green play button, a set of simple puzzles will be served to you. To solve the puzzle, all you need to do is to tweak around with the buttons coloured in yellow and then click on the green play button to enter your "answer" into the Turing machine. If your "answer" manages to alter the bar of ones and zeros to match the "key" shown, you will light up one of the letters of "Google".

Well of course, if you don't know by now, this doodle is created to commemorate the 100th birthday of Alan Turing, the man who laid the foundation for the creation of the modern computer. Without him, we might probably never have personal computers, mobile phones and god knows what else...