@Gylfie3814 that's not possible. Each string can only have one colour, but you can make the strings of colour c 4 different colours instead of one in a variation to create a similar effect. You'd just use c, d, e and f instead of c, c, c and c, if that makes sense.
@KLCatLady do u know how to make an alpha? So your pattern must have an even amount of string. Then you double the string. After that u take the doubled string, wrap it around the keychain and then pull it through the look again