It is 5 colors, but it can be done with just 1, 4 color ams. load your colors in this order. ams slot 1 Black, slot 2 red, slot 3 yellow and slot 4 green. it will do all the black base then it will unload and switch to red. After the black has been unloaded and has switch to red, remove the black and replace it with blue. that is it. it will finish the print as it should. if you download the raw models, it is slightly big for a keychain. I scaled it to 90%. that is what the 3MF file will load as. it will also load 12 so delete the ones you done need. enjoy and happy printing. If you don't feel confident enough to print this yourself here is my website link where you can purchase one already printed. https://square.link/u/QlynHwWv