1. Install Grunt globablly with 'npm install -g grunt-cli'.
2. CD into the leetcode directory.
3. Run 'npm install' to install dependencies in the package.json file.
4. From the project root, run 'grunt' in terminal'
5. Open index.html in your browser and open the console.
6. Within index.html, load the Javascript files you want to tinker within in the console.