creates a lookup based on the range

(-> (create-lookup “01234” 5 5) (str-vals)) => {5 “0”, 6 “1”, 7 “2”, 8 “3”, 9 “4”}

creates a multi gradient map

(-> (create-multi 3) (select-keys 0 3 6) (str-vals)) => {0 “ÆÑÊ”, 3 “ŒØM”, 6 “ÉËÈ”}

creates a single gradient map

(-> (create-single) (select-keys 0 1 2 3) (str-vals)) => {0 “Æ”, 1 “Ñ”, 2 “Ê”, 3 “Œ”}

look up a character based on value

(str (lookup-char 0)) => #{“Æ” “Ñ” “Ê”}

(str (lookup-char 6)) => #{“É” “Ë” “È”}