Wiring 12v liner actuator with timer delay - Electric Engineering

I would like to have an assistance to have a wiring diagram for 12v liner actuator with timer delay to controller the moving time. The control will be through using either selector switch or rocker switch. Additionally, it will have two modes (Auto mode & Manual Mode). If I select the Auto Mode (selector switch) it will be controlled through the timer, and if I am using Manual Mood (selector switch) it will enable me to control the movement manually. Please note that, I am not an electrical engineer, so I need a very simple diagram.