A pattern matching captcha system for your node webapps. It comes with style with android like pattern capturing scheme and provide secure captcha by distroting, randomizing color, matrix and pattern, which makes it hard for bots to extract pattern sequence from it.
npm install pattern captcha
node-canvas: for drawing purpose.
patternLock: A UI android style pattern lock plugin to capture pattern from user.
See example and complete documentation over http://ignitersworld.com/lab/patternCaptcha.html