“Paint By Numbers” is about serendipity. It deals with the accident of finding something good or useful while not specifically searching for it.
The figure outside the field speaks random numbers. There is a color marker attached to the figure on the field. You are allowed to move the figure on the field according to the spoken numbers.
What is random and what is it good for.
Not only cryptography requires good random numbers. Serendipity is about predestination and Tychismus.
There are countless discoveries and inventions based on chance or clumsiness, including: Tesa tape is unfortunately a too strong adhesive Leukoplast. Post-it should be a super glue once. Charles Goodyear invented vulcanization by muddleheadedness.
Chocolate Cookies were invented by Ruth Wakefield, as she tried to make chocolate chip cookies. She did not have the right chocolate, which is why she broke up a chocolate bar and gave the pieces into the batter mixture. This created what we now know as chocolate cookies.