diff --git a/book/features/adding_HTML_elements.md b/book/features/adding_HTML_elements.md
index c8fcd2d..41f3a9c 100644
--- a/book/features/adding_HTML_elements.md
+++ b/book/features/adding_HTML_elements.md
@@ -25,7 +25,7 @@ What does this code do? In HTML, certain active parts of the code are defined as
 
 Let's take a closer look at the source. Since this project uses a local file structure, we can make use of relative paths such as `../_static/element_render box.html`. What does this path do? In this project, the markdown file for this article is located in the directory `book/features/adding_HTML_elements.md`. The HTML element we want to embed is located in the directory `book/_static/element_render_box.html`. The relative path thus works as follows: 
  - We start in the markdown file's directory `book/features/adding_HTML_elements.md`
- - The string `"../"` tells the iframe to move up one folder to `book`
+ - The string `"../"` tells the iframe to move up one folder to `book`. If you need to move up more subdirectories, use it recursively, eg. `../../` moves up two directories.
  - The following string `"_static/"` tells the iframe to navigate into the `_static` folder. We are now in `book/_static/`.
  - Finally, the string `"element_render_box.html"` selects the HTML file we want to embed. We are now in `book/_static/element_render_box.html`.
 
diff --git a/book/features/creating_basic_HTML_elements.md b/book/features/creating_basic_HTML_elements.md
index a73fe7e..3d44023 100644
--- a/book/features/creating_basic_HTML_elements.md
+++ b/book/features/creating_basic_HTML_elements.md
@@ -1,20 +1,7 @@
 # Creating basic interactive HTML/JavaScript elements
 
-## Embedding HTML files
-A straightforward way to create interactive web-based elements is to code them directly using HTML with JavaScript. This allows us to build elements such as the one below, which shows the connection between a probability density function (pdf) and the associated cumulative density function (cdf):
-
 <iframe src="../_static/element_pdf_and_cdf.html" width="600" height="300" frameborder="0"></iframe>
 
-If we want to embed such figures in the teachbook, you can do so via an iframe which references a html file in the _static folder:
-
-```html
-<iframe src="../_static/element_pdf_and_cdf.html" width="600" height="300" frameborder="0"></iframe>
-```
-
-Here, the src path moves up one subdirectory, then enters the `_static` folder, and loads the `element_pdf_and_cdf.html` file. So how do we create this figure?
-
-## Creating a basic interactive HTML/JavaScript element
-
 At the bottom of this page, I will provide the full code for the interactive element above. In this section, let us go through the code one piece at a time. Let us begin from the top.
 
 In the first line, we specify that this file is a HTML file. In the header (`<head>`), we can load packages we need later on. Within the `<script>` tags, we are loading three different libraries from web servers: `math.js`, which provides functions for basic mathematical operations (similar to Python's `numpy` library), as well as two versions of the library `d3.js`, which contains many extremely useful functions for web interactivity.