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Taking a look at a slightly more complex input program, I realise that I really need a fast clock option. Ideally, a high-frequency crystal oscillator signal that can be divided down to more manageable speeds.
After a suggestion from a viewer, I decided to look at the CD4060 integrated circuit. With this IC I can make the high-speed oscillator circuit and divide it down all with one chip.
I go through the new program line by line, then try it out using the slow clock. I then connect up the fast clock and demonstrate the difference it makes.