Update README.md

README.md

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 Track the outbreak of the Corona Virus.
 
+## Screenshots
+
+**Light Theme**
+
+<p align="center">
+    <img src="assets/pictures/Shot1.png" height="480" width="270">
+    <img src="assets/pictures/Shot2.png" height="480" width="270">
+    <img src="assets/pictures/Shot3.png" height="480" width="270">
+</p>
+
+**Dark Theme**
+
 <p align="center">
-    <img src="assets/pictures/Shot1.jpg" height="480" width="270">
-    <img src="assets/pictures/Shot2.jpg" height="480" width="270">
-    <img src="assets/pictures/Shot3.jpg" height="480" width="270">
-    <img src="assets/pictures/Shot4.jpg" height="480" width="270">
+    <img src="assets/pictures/Shot4.png" height="480" width="270">
+    <img src="assets/pictures/Shot5.png" height="480" width="270">
+    <img src="assets/pictures/Shot6.png" height="480" width="270">
 </p>
 
+## Features
+- Display the total cases of *COVID-19* diseases world wide, along with
+  the number of casualties and recovered
+- Get the details of all affected countries along with rankings like..
+  - Cases
+  - Today cases
+  - Deaths
+  - Today deaths
+  - Active cases
+  - Critical cases
+  - Number of recovered people
+- Can sort the list of countries accordingly
+- Search of an individual country
+- How the visual diagram and other stats when clicked on a country
 ## Credits
 - [API](https://github.com/javieraviles/covidAPI) is provided by [Javier
   Aviles](https://github.com/javieraviles)