Sequential HDMI switcher??

[muleycrazy]

What I am trying to do is, I have an office TV with 3 hdmi inputs.  It is currently used to display my computer screen which is displaying scheduling information.  I am getting some security cameras & want this same TV to display both the scheduling information screen & the security camera images automatically.  Example change screens every 30-60 seconds from scheduling information screen to security camera images

Any help would be appreciated.

Thanks