it appears you are describing what we refer to as dumb rgb strings and 4 channel dmx decoder. if so, you can change the color of the modules one color at time. you will need hardware that can send dmx.Either xlights or Vixen software will allow you to control the lights. You could also go for something like wled running on esp8266 or esp32 and a 485max transceiver. That would a good way to go.
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