add rainbow example

examples/rainbow.js

@@ -0,0 +1,39 @@
+const chalk = require('..');
+
+const ignoreChars = /[^!-~]/;
+
+function rainbow(str, offset) {
+	if (!str || str.length === 0) {
+		return str;
+	}
+
+	const hueStep = 360 / str.replace(ignoreChars, '').length;
+
+	let hue = offset % 360;
+	const chars = [];
+	for (const c of str) {
+		if (c.match(ignoreChars)) {
+			chars.push(c);
+		} else {
+			chars.push(chalk.hsl(hue, 100, 50)(c));
+			hue = (hue + hueStep) % 360;
+		}
+	}
+
+	return chars.join('');
+}
+
+function sleep(ms) {
+	return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+async function animateString(str) {
+	console.log();
+	for (let i = 0; i < 360*5; i++) {
+		console.log('\x1b[1F\x1b[G ', rainbow(str, i));
+		await sleep(2);
+	}
+}
+
+console.log();
+animateString('We hope you enjoy the new version of Chalk 2! <3').then(() => console.log());

examples/screenshot.js

@@ -1,8 +1,9 @@
 'use strict';
-const chalk = require('.');
+const chalk = require('..');
+const styles = require('ansi-styles');
 
 // Generates screenshot
-for (const key of Object.keys(chalk.styles)) {
+for (const key of Object.keys(styles)) {
 	let ret = key;
 
 	if (key === 'reset' || key === 'hidden' || key === 'grey') {