Change Contents Action on a Delay

Assign actions to the items as follows:Item 1 (initially visible)On show, hide self, delay 3 secondsOn hide, show Item 2Item 2 (uncheck initially visible)On show, hide self, delay 3 secondsOn hide, show Item 3Item 3 (uncheck initially visible)On show, hide self, delay 3 secondsOn hide, show Item 1Hope this helps.