Add Groovy Effect in Blogger

Groovy  is a slang colloquialism popular during the 1960s and 1970s. It is roughly synonymous with words such as "cool," "excellent," "fashionable," or "amazing," depending on context. Since other bloggers have this kind of niche or just want to add this kind of effect  in their blog. I was convinced to make an article and share it to my readers as well. See the background of this page for a live demo.
Music video credit.


Also Read: Add Star Space Warp Effect In Blogger

 How to Add Groovy Effect in Blogger

Go to Blogger Dashboard
Click  Template >> Edit HTML
Look for the code below

</head>

Just above that code, paste the code below

<script type="text/javascript">
// <![CDATA[
var border=100; // how wide is each border in pixels
var effects=3; // how many of the effect are on the page
var speed=50; // how fast is the animation (lower is faster)
var colours=new Array("#9cf", "#c9f", "#fc9", "#f9c", "#cf9", "#9fc", "#6ff", "#f6f", "#ff6");
// above line lists colours for the groovy effect (the list can be as long or short as you like)

/****************************
*1970s Groovy WebPage Effect*
*  Bloggingtipsandtrix  *
****************************/

function addLoadEvent(funky) {
  var oldonload=window.onload;
  if (typeof(oldonload)!='function') window.onload=funky;
  else window.onload=function() {
    if (oldonload) oldonload();
    funky();
  }
}

addLoadEvent(yowzah);

var swide, shigh, boddie;
var h=new Array();
var v=new Array();
var op=1/(effects+1);
function yowzah() { if (document.getElementById) {
  var i, d, s;
  boddie=document.createElement("div");
  s=boddie.style;
  s.position="fixed";
  s.backgroundColor="transparent";
  s.top="0px";
  s.left="0px";
  s.width="100%";
  s.zIndex="-1";
  set_width();
  i=document.body.style.backgroundColor;
  if (document.body.parentNode) {
    if (i) document.body.parentNode.style.backgroundColor=i;
    document.body.style.backgroundColor="transparent";
  }
  document.body.insertBefore(boddie, document.body.firstChild);
  for (i=0; i<effects*10; i+=10) {
    d=document.createElement("div");
    s=d.style;
    s.left="0px";
s.width="100%";
    h[i]=Math.floor(Math.random()*(shigh-border)/3);
    h[i+1]=shigh-Math.floor(Math.random()*(shigh-border)/3);
    h[i+2]=(Math.random()<0.5?1:-1)*scat(0);
    h[i+3]=(Math.random()<0.5?1:-1)*scat(h[i+2]);
    s.position="absolute";
    s.top=h[i]+"px";
    s.height=(h[i+1]-h[1])+"px";
    s.borderStyle="solid";
    s.borderWidth=border+"px 0px";
    jazzy(s, 'borderTopColor');
jazzy(s, 'borderBottomColor');
    jazzy(s, 'backgroundColor');
    s.opacity=op;
    if (navigator.appName=="Microsoft Internet Explorer") s.filter="alpha(opacity="+(100*op)+")";
    h[i+5]=s;
    boddie.appendChild(d);
  }
  for (i=0; i<effects*10; i+=10) {
    d=document.createElement("div");
    s=d.style;
s.top="0px";
    s.height="100%";
    v[i]=Math.floor(Math.random()*(swide-border)/3);
    v[i+1]=swide-Math.floor(Math.random()*(swide-border)/3);
    v[i+2]=(Math.random()<0.5?1:-1)*scat(0);
    v[i+3]=(Math.random()<0.5?1:-1)*scat(v[i+2]);
    s.position="absolute";
    s.left=v[i]+"px";
    s.width=(v[i+1]-v[i])+"px";
    s.borderStyle="solid";
    s.borderWidth="0px "+border+"px";
    jazzy(s, 'borderLeftColor');
    jazzy(s, 'borderRightColor');
    jazzy(s, 'backgroundColor');
    if (navigator.appName=="Microsoft Internet Explorer") s.filter="alpha(opacity="+(100*op)+")";
    else s.opacity=op;
    v[i+5]=s;
    boddie.appendChild(d);
  }
  setInterval('groovy()', speed);
}}

var old_jazz=false;
function jazz() {
var new_jazz;
do { new_jazz=colours[Math.floor(Math.random()*colours.length)]; }
while ( new_jazz==old_jazz );
old_jazz=new_jazz;
return (new_jazz);
}

function jazzy(hip, jive) {
var new_jive;
do { new_jive=colours[Math.floor(Math.random()*colours.length)]; }
while (new_jive==hip[jive]);
hip[jive]=new_jive;
}

function scat(no) {
var yes;
no=Math.abs(no);
do { yes=2+Math.floor(Math.random()*3); }
while ( no==yes );
return (yes);
}

function groovy() {
  var i;
  for (i=0; i<effects*10; i+=10) {
h[i]+=h[i+2];
h[i+1]+=h[i+3];
if (h[i+1]-h[i]<5) {
 h[i+4]=h[i+2];
 h[i+2]=h[i+3];
 h[i+3]=h[i+4];
 jazzy(h[i+5], 'backgroundColor');
}
    if (h[i]<-border) {
if (h[i+2]<0 && Math.random()<1/border) {
h[i+2]=scat(h[i+3]);
jazzy(h[i+5], 'borderTopColor');
}
}
if (h[i+1]>shigh) {
if (h[i+3]>0 && Math.random()<1/border) {
h[i+3]=-scat(h[i+2]);
jazzy(h[i+5], 'borderBottomColor');
}
}
h[i+5].top=h[i]+"px";
    h[i+5].height=(h[i+1]-h[i])+"px";

v[i]+=v[i+2];
v[i+1]+=v[i+3];
if (v[i+1]-v[i]<5) {
 v[i+4]=v[i+2];
 v[i+2]=v[i+3];
 v[i+3]=v[i+4];
 jazzy(v[i+5], 'backgroundColor');
}
if (v[i]<-border) {
if (v[i+2]<0 && Math.random()<1/border) {
v[i+2]=scat(v[i+3]);
jazzy(v[i+5], 'borderLeftColor');
}
}
if (v[i+1]>swide) {
if (v[i+3]>0 && Math.random()<1/border) {
v[i+3]=-scat(v[i+2]);
jazzy(v[i+5], 'borderRightColor');
}
}
v[i+5].left=v[i]+"px";
    v[i+5].width=(v[i+1]-v[i])+"px";
  }
}

window.onresize=set_width;
function set_width() {
  var sw_min=999999;
  var sh_min=999999;
  if (document.documentElement && document.documentElement.clientWidth) {
    if (document.documentElement.clientWidth>0) sw_min=document.documentElement.clientWidth;
    if (document.documentElement.clientHeight>0) sh_min=document.documentElement.clientHeight;
  }
  if (typeof(self.innerWidth)!="undefined" && self.innerWidth) {
    if (self.innerWidth>0 && self.innerWidth<sw_min) sw_min=self.innerWidth;
    if (self.innerHeight>0 && self.innerHeight<sh_min) sh_min=self.innerHeight;
  }
  if (document.body.clientWidth) {
    if (document.body.clientWidth>0 && document.body.clientWidth<sw_min) sw_min=document.body.clientWidth;
    if (document.body.clientHeight>0 && document.body.clientHeight<sh_min) sh_min=document.body.clientHeight;
  }
  if (sw_min==999999 || sh_min==999999) {
    sw_min=800;
    sh_min=600;
  }
  swide=sw_min;
  shigh=sh_min;
  boddie.style.height=shigh+"px";
}
// ]]>
</script>

Click Save Template button and congratulations!
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