Auto-send Direct Message Twitter Script

I'd like someone to write a script/program that allows my twitter account to automatically send a direct message (within 1 second, less than 1 second preferred) to a user-specific twitter account with a user-specific message whenever that user-specific twitter account sends out a "tweet" that contains user-specified info. Please send me a message for more detailed info. Applicant must be highly experienced in this area of expertise and please show me how you're best fit for this project. Applicant also must have a high feedback rating on Freelancer.com The script must be tested and proven to work before the applicant gets paid for this project. No exceptions.