build a Twitter bot that retweets users if they tweet about certain terms

I will create a Twitter bot that searches for tweets under certain terms and RT them.
For example, I could set it to search for tweets with a hashtag and then it will retweet any of those tweets every hour at 3 tweets an hour to keep the account from getting suspended.
Examples of my work can be seen at:
http://twitter.com/firefoxhate
http://twitter.com/chromehate
http://twitter.com/winnovatingbot