Update README.md

Author: mcdev7777

README.md

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 # Battleship-JavaScript
 A very very simple Battleship game written in plain JavaScript: http://learntocodela.github.io/Battleship-JavaScript/
+
+Read about the game and its rules here: https://en.wikipedia.org/wiki/Battleship_(game)
+
+## Step 1: Create your files
+
+Useful references:
+- [Final HTML file](https://github.com/LearnToCodeLA/Battleship-JavaScript/blob/gh-pages/index.html)
+- [Final CSS file](https://github.com/LearnToCodeLA/Battleship-JavaScript/blob/gh-pages/style.css)
+- [Final JS file](https://github.com/LearnToCodeLA/Battleship-JavaScript/blob/gh-pages/battleship.js)
+- [CSS Relative and Absolute Positioning](http://learnlayout.com/position.html)
+
+## Step 2: Create a grid on your HTML page for the game board
+
+Useful references:
+- [Document.getElementById()](https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById)
+- [Document.createElement()](https://developer.mozilla.org/en-US/docs/Web/API/Document/createElement)
+- [appendChild()](https://developer.mozilla.org/en-US/docs/Web/API/Node/appendChild)
+- [style property](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/style)
+- [Loops in JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration)
+
+## Step 3: Model the game board in JavaScript and place ships
+
+Useful references:
+- [Arrays in JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)
+
+## Step 4: Create event handler and write the game logic
+
+Useful references:
+- [Events in JavaScript](http://www.kirupa.com/html5/javascript_events.htm)
+- [Handling Events for Many Elements](http://www.kirupa.com/html5/handling_events_for_many_elements.htm)
+
+## Step 5: Play the game!
+
+Play the game here: http://learntocodela.github.io/Battleship-JavaScript/
+
+Features to implement next:
+- Display game messages within the HTML page instead of using [alert()](https://developer.mozilla.org/en-US/docs/Web/API/Window/alert)
+- Randomize placement of the ships at the start of each game
+- Make better graphics, maybe add sound effects?
+- Make a 2-player version of the game!