How to use a slider to turn on and off lights

[altenbach]

You have 20x too much code for all this, lots of duplicates.

Write your program is a way that you don't need the "continuous run" button.

Try to use array of controls and indicators.

For only three possible positions, a radiobutton might be more appropriate than a slide.

What is the purpose of the 8 buttons?

Why can't you write all chanels at once instead of in random order?