Conver Minecraft banner give command from 1.8 to 1.13+. Colors codes changes between 1.11 and 1.12. NBT and command Syntax has changed from 1.11 and 1.14.
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Added: Chess pieces
Added: Cute Banners
Patch: Fixed alpha transparencies on banner previews.
Added: Banner Generator
Patch: Top Triangle Sawtooth was swapped with Top Triangle
Added: Letters A-Z
Added: Numbers 0-9
Added: 22 initial flags
Added: Banner converter