Create simple Twilio app

Hello, We would like you to bulid us a simple Twilio app, that does the following. We have a incomming number eg. 876 543 21. If you call this 5 out of 7 days, within 10 to 16, a short message should be played and the call forwarded to number eg. 123 456 78 If you call eg. 876 543 21 outside the stated hours above, another message should be played and the phone hung up. The messages played, should be .mp3's and it should be possible for us to change the opening hours. No fancy designer OS is needed. Plain code is fine, as long as you provide us with the basic instructions. This task requires experience with Twilio