Update README.md

Author: CodingWithTashi

README.md

@@ -3,8 +3,11 @@
 simple_barcode_scanner let you scan barcode and qr code.
 
 ## Demo
-![Image](https://github.com/CodingWithTashi/simple_barcode_scanner/blob/master/example/demo/search.png?raw=true)
 
+
+Web         |  Mobile
+:-------------------------:|:-------------------------:
+<img src="https://github.com/CodingWithTashi/simple_barcode_scanner/blob/main/example/demo/barcode_web.gif" alt="drawing" width="500" height="600"/>  |  <img src="https://github.com/CodingWithTashi/simple_barcode_scanner/blob/main/example/demo/barcode_mobile.gif" width="400" height="600" alt="drawing"/>
 ## Features
 
 * Scan barcode in mobile devices using flutter_barcode_scanner