modified README

README.md

@@ -5,11 +5,13 @@
 ![GitHub release (latest by date)](https://img.shields.io/github/v/release/geraked/application-batteryban)
 
 It's a single page app that controls the Battery Percentage of Android devices. It sends signals through UART to the microcontroller (MCU).
+
 When the MCU receives `1`, It must connect the charger and when receives `0`, must cut-off the charger. So design your board and program the MCU to do Sth like this.😉
+
 Source of the project is available, just open the `src` folder as a project in Android Studio and start modifying.
 
 <p align="center">
-    <img src="docs/demo.gif" alt="demo">
+    <img src="docs/demo.gif" width="250px" alt="demo">
 </p>
 
 ## Release