Any plugin/theme available which suits my requirement? [closed]

I doubt you’ll find any themes or plugins designed for that exact purpose, but it wouldn’t be hard to roll your own solution. For example, if you put your text in a post or page, with each “band” in it’s own paragraph, you could add in some simple CSS to get the desired effect.

p {
    padding: 50px;
    color: white;
}

p:nth-child(odd) { background: red; }

p:nth-child(even) { background: blue; }

Here’s a sample JSFiddle: http://jsfiddle.net/galengidman/4thUh/