Update index.html

public/index.html

@@ -69,7 +69,7 @@ print(figure)`;
 }
 </script>
 
-<input id="text" type="text"><button onclick="runit()">Declarar</button>
+<input id="text" type="text"><button onclick="runit()">SIGN!!</button>
 <br>
 <textarea name="" id="output" cols="30" rows="10"></textarea>
 <a href="//twitter.com/share?ref_src=twsrc%5Etfw" class="twitter-share-button" id="tweet" data-text="nothing" data-show-count="false">Tweet</a><script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>