This is rather an educational script on how you can put multiple channels on the chart in a relatively non-confusing manner. Because it can be done doesn't mean you should do it (especially as a beginner). However, you might want to use maybe two.
Normally, TradingView would put them all over each other causing chart to lose readability. By a few clever conditions, higher timeframe KC does draw on the chart only if it is outside lower timeframe KC. Lower timeframe Donchian is 99,5% outside both Keltner Channels, and it will not show if it overlaps at any point. Higher TF Donchian ale two lines but no background.
Keltner channel 1 uses original settings Keltner channel 2 uses TradingView default settings Donchian 1 uses TradingView default Donchian 2 uses 60 periods used by Turtles if I remember it correct
Would you consider to add Higher DC's median line?