Basic Animation

I just started my first animation in Synfig and that’s why I’ve got many problems. I drew first frames and after dome seconds I want completely different drawing appear on the animation and he previous disappear. But I don’t know how to do that. I drew a few pictures and each of them is the other group. I don’t know what to do to see only one group during first 5 seconds and the other drawing during next seconds.
I will be grateful for help.

Hello and welcome here …

Please try the forum’s search function before asking something. You will found also the answer into the synfig’s wiki (how do i).