I need to post to chatter if any opportunity stage is not changed from last 4 days.

I tried it doing by process bulider but its not working.

Steps i follwed for process bulider..

1. I created a date field () on opportunity which add the date when last opportunity stage is change.
2. 
3. 
4. 
5. 

But i is not working.. can any one suggested the correct way or any other way or process to post to chatter

I am using Visualforce page and i want table of content(index) with page number.

i am using the below code but i am not getting page number.
or is there any other way to do the same?

in vf page for index:
<nav>
<ol>
<li class="bodymatter "><a href="#intr_01">Introduction</a></li>
<li class="bodymatter"><a href="#chap_01">Chapter One</a></li>
</ol> </nav>

vf page with content:
<h1 id="intr_01"> Introduction</h1>
<p>some logic</p>
<h1 id="chap_01"> Chapter One</h1>
<p>some logic</p>

CSS:
.bodymatter a::after { content: leader('.') target-counter(attr(href url), page, decimal) }

Result expected:
Introduction.........1
Chapter One...........2

I am using Visualforce page and i want table of content(index) with page number.

i am using the below code but i am not getting page number.
or is there any other way to do the same?

in vf page for index:
<nav>
<ol>
<li class="bodymatter "><a href="#intr_01">Introduction</a></li>
<li class="bodymatter"><a href="#chap_01">Chapter One</a></li>
</ol> </nav>

vf page with content:
<h1 id="intr_01"> Introduction</h1>
<p>some logic</p>
<h1 id="chap_01"> Chapter One</h1>
<p>some logic</p>

CSS:
.bodymatter a::after { content: leader('.') target-counter(attr(href url), page, decimal) }

Result expected:
Introduction.........1
Chapter One...........2