Well... I'm not a great tutor but I'll try to explain.
Here's an example:
>on left mouse button click
>create new sprite (mouse.X + 105; mouse.Y)
>create new text (mouse.X + 105; mouse.Y)
(Just example values and names) You need to have a sprite and a text somewhere on the layout to be able to create them.
If you're new then don't think about animations or any fancy stuff just yet, learn the basics first.
I don't know if you're a beginner and understood any of this. If you are then I advise you to check out some tutorials on http://www.scirra.com