RGB LED strip presets controlled by a switch via 2-pin connector
The RGB 2pin LEDs can be programmed to sequence thru 1 of 8 colours using a power-off glitch as small as 1 us.  Thus they may all be synchronized but need a number of pulses to achieve a steady colour.

I don’t know the sequence but I suspect combinations of  1 , 2 and all 3 LEDs to make up these colors.