improves the dct explanation

README.md

@@ -489,11 +489,16 @@ As we can see it resembles the original image but it introduced lots of differen
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 > It's important to note that each coefficient doesn't directly map to a single pixel but it's a weighted sum of all pixels. This amazing graph shows how the first and second coefficient is calculated, using weights which are unique for each index.
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-> You can also try to [visualize the DCT by looking at a simple image](/dct_better_explained.ipynb) formation over the DCT basis.  
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 > ![dct calculation](/i/applicat.jpg "dct calculation")
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 > Source: https://www.iem.thm.de/telekom-labor/zinke/mk/mpeg2beg/whatisit.htm
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+> You can also try to [visualize the DCT by looking at a simple image](/dct_better_explained.ipynb) formation over the DCT basis. For instance, here's the [A character being formed](https://en.wikipedia.org/wiki/Discrete_cosine_transform#Example_of_IDCT) using each coefficient weight.
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+> ![](https://upload.wikimedia.org/wikipedia/commons/5/5e/Idct-animation.gif )
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