BUTTON CODE!!!

<a onclick="this.nextSibling.style.display=(this.nextSibling.style.display=='none')?'block':'none';">
<button><p style= "color : black ; font-size: 15px">How 2 Code</button></a><div style="display:none; background:white"><ul>
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<br>※URL
<br>☞ http://hahacoding.blogspot.kr/
<br> &nbsp;</ul></div>


 You can change red one, blue one, green one, orange one and yellow one if you want.
But remember never change other ones!!!

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COMMENT IS VERY HELPFUL FOR ME.