NodeJS unindent repl

When prototyping a function in the nodejs repl I am unable to get back to the actual repl after completing the function like so:

> function build_color_pallete(ruleLen) {
... function get_random_color() {
..... var letters = '0123456789ABCDEF'.split('');
..... var color = '#';
..... for (var i = 0; i < 6; i++) {
....... color += letters[Math.round(Math.random() * 15)];
....... }
..... return color;
..... }
... 
... 

Is there a special technique / keybinding for returning to the repl so I can execute the function?