If you have AMS just use one of the provided print profile

Swap Instructions (if you do not have AMS):

Start with black PLA Basic | Bambu Lab EU

At layer #18 (1.56mm) swap to Gray PLA Basic Filament with spool / 1kg / Black (10101) | Bambu Lab EU

At layer #25 (2.12mm) swap to Silver PLA Basic Filament with spool / 1kg / Gray (10103) | Bambu Lab EU

At layer #31 (2.60mm) swap to White for the rest PLA Basic Filament with spool / 1kg / Black (10101) | Bambu Lab EU