--- /dev/null
+module['exports'] = function(colors) {
+ // RoY G BiV
+ var rainbowColors = ['red', 'yellow', 'green', 'blue', 'magenta'];
+ return function(letter, i, exploded) {
+ if (letter === ' ') {
+ return letter;
+ } else {
+ return colors[rainbowColors[i++ % rainbowColors.length]](letter);
+ }
+ };
+};
+