add images in readme github file

You can also use relative paths like

![Alt text](relative/path/to/img.jpg?raw=true "Title")
Also try the following with the desired .fileExtention:

![plot](./directory_1/directory_2/.../directory_n/plot.png)

Here is what the above code is Doing:
1. It’s creating a list of all the files in the directory.
2. It’s creating a list of all the files in the directory that end with .png.
3. It’s creating a list of all the files in the directory that end with .jpg.
4. It’s creating a list of all the files in the directory that end with .gif.
5. It’s creating a list of all the files in the directory that end with .bmp.
6. It’s creating a list of all the files in the directory that end with .tif.
7. It’s creating a list of all the files in the directory that end with .tiff.
8. It’s creating a list of all the files in the directory that end with .svg.
9. It’s creating a list of all the files in the directory that end with .eps.
10. It’s creating a list of all the files in the directory that end with .pdf.