MultiTimeFrame Shifting Bollinger Bands

Just 3 Bollinger Bands with different adjustable timeframes plus shifting (left/right) capability and non-integer deviation values.
I wrote this because I couldn't find the perfect BB indicator that matches my needs. Feel free to use it.

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- A tweak to the background colors transparency

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Completely changed code structure (because Pine is an odd and weak scripting language!)
Added options to show/hide BBs
The highest and the lowest band of all showing BBs has been highlighted

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Added options to show/hide MAs