Well we just learned together.
The first step you should do is to enter the "Design" then go to the "Edit HTML" and then check the "Expand widget templates"
and look for code like this widget
<b:widget id='HTML1' locked='false' title='Message' type='HTML'>
<b:includable id='main'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>
<b:include name='quickedit'/>
</b:includable>
</b:widget>
<b:includable id='main'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>
<b:include name='quickedit'/>
</b:includable>
</b:widget>
To facilitate the search please enter the title of the widget such as "Message" into the browser's search box (ctrl + F)
Then add code
<b:if cond='data:blog.url == data:blog.homepageUrl'>
and closed with the code </b:if> to put in only the front page only
and placed as below
<b:widget id='HTML1' locked='false' title='Pesan' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.url == data:blog.homepageUrl'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>
<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget>
Note the placement of code that is green!
then save.
And below is the code that can be used for other placement
To put on the front page / index used code
<b:if cond='data:blog.pageType != data:blog.homepageUrl'>
To put it in the yard Archive
<b:if cond='data:blog.pageType == "archive"'>
To place an item page / posting it used code
<b:if cond='data:blog.pageType == "item"'>
And for the static pages or pages used blogger page
<b:if cond='data:blog.pageType == "static_page"'>
And for additional, if you want to put on a particular page using the URL use the code below
Replace code URL_HERE with the URL you want to show.
<b:if cond='data:blog.url == "URL_HERE"'>
And for exceptions, for example you do not place the widget only on the front page just by replacing the first = sign with the sign!
example
may be useful