Update readme

README.md

 # dotacat
 
-dotacat is meant to be a replacement to lolcat.
+`dotacat` is meant to be a replacement to `lolcat`. If you're not aware, `lolcat` is a rather silly program which behaves like `cat`, but produces a colourful, rainbow output.
+
+![](screenshot.png?raw=true)
 
 ## Why?
 
@@ -37,8 +39,8 @@ If you have cargo installed, just run: `cargo install dotacat`
 If not, head over to the [releases page](https://git.scd31.com/stephen/dotacat/releases) and download the latest release. Then run:
 
 ```
+chmod +x dotacat
 sudo mv dotacat /bin/
-sudo chmod +x /bin/dotacat
 ```
 
 ## Usage