diff --git a/README.md b/README.md
index 49b7d5e..5b19cfd 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,12 @@
 
 A project based learning activity for people who are getting started with Git and GitHub.
 
+Cambio 4 QA
+
+prueba de push
+
+prueba
+
 Cambio 1.1
 
 
diff --git a/inde.html b/inde.html
index 476ed2e..2a466b1 100644
--- a/inde.html
+++ b/inde.html
@@ -1,7 +1,9 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <title>Javascript Tetris Cambio 3.3 dev</title>
+  
+  <title>Cambio 4 QA  -  Javascript Tetris Cambio 3.3 dev</title>
+
   <style>
     body      { font-family: Helvetica, sans-serif; }
     #tetris   { margin: 1em auto; padding: 1em; border: 4px solid black; border-radius: 10px; background-color: #F8F8F8; }
diff --git a/stats.js b/stats.js
index 5d89bff..013dd3e 100644
--- a/stats.js
+++ b/stats.js
@@ -1,4 +1,5 @@
 // stats.js r6 - http://github.com/mrdoob/stats.js
+// cambio 4 QA
 var Stats=function(){function s(a,g,d){var f,c,e;for(c=0;c<30;c++)for(f=0;f<73;f++)e=(f+c*74)*4,a[e]=a[e+4],a[e+1]=a[e+5],a[e+2]=a[e+6];for(c=0;c<30;c++)e=(73+c*74)*4,c<g?(a[e]=b[d].bg.r,a[e+1]=b[d].bg.g,a[e+2]=b[d].bg.b):(a[e]=b[d].fg.r,a[e+1]=b[d].fg.g,a[e+2]=b[d].fg.b)}var r=0,t=2,g,u=0,j=(new Date).getTime(),F=j,v=j,l=0,w=1E3,x=0,k,d,a,m,y,n=0,z=1E3,A=0,f,c,o,B,p=0,C=1E3,D=0,h,i,q,E,b={fps:{bg:{r:16,g:16,b:48},fg:{r:0,g:255,b:255}},ms:{bg:{r:16,g:48,b:16},fg:{r:0,g:255,b:0}},mb:{bg:{r:48,g:16,
 b:26},fg:{r:255,g:0,b:128}}};g=document.createElement("div");g.style.cursor="pointer";g.style.width="80px";g.style.opacity="0.9";g.style.zIndex="10001";g.addEventListener("click",function(){r++;r==t&&(r=0);k.style.display="none";f.style.display="none";h.style.display="none";switch(r){case 0:k.style.display="block";break;case 1:f.style.display="block";break;case 2:h.style.display="block"}},!1);k=document.createElement("div");k.style.backgroundColor="rgb("+Math.floor(b.fps.bg.r/2)+","+Math.floor(b.fps.bg.g/
 2)+","+Math.floor(b.fps.bg.b/2)+")";k.style.padding="2px 0px 3px 0px";g.appendChild(k);d=document.createElement("div");d.style.fontFamily="Helvetica, Arial, sans-serif";d.style.textAlign="left";d.style.fontSize="9px";d.style.color="rgb("+b.fps.fg.r+","+b.fps.fg.g+","+b.fps.fg.b+")";d.style.margin="0px 0px 1px 3px";d.innerHTML='<span style="font-weight:bold">FPS</span>';k.appendChild(d);a=document.createElement("canvas");a.width=74;a.height=30;a.style.display="block";a.style.marginLeft="3px";k.appendChild(a);
