Moving Heads using camera -- 2

Job ID: 37009778

Budget: $30 – $250 USD

Hi, I've found a project where people walking by are followed by eyes.
See -> https://www.youtube.com/watch?v=ptRsUJU7Q7c&list=UUegrnACOf_ak3ijtqRXcc2w&index=59

I need a system where I can use images of animals who look at people walking by.
the system will be using :
- one TV screen
- one raspberry pi as operating module.
- one webcam to track people walking by.