I have a text area field where i need to provide information about the word count when the user enters some text in the field. Length of the field is supposed to be 500 Characters.
Initialy it must show 

> 
> min characters:100 | 0 of 500 // 0 of 500 must be in red color
> 
> 
> 

and once the user enters come character need to update the count as well. Once the user reaches the count say the min character 100, i need to display 

> 
> min characters:100 | 100 of 500 // 100 of 500 must be in green color.
> 
> 
> 

How can i do this?? is there any plugin for the same???
let me know your thoughts on this.