Will you help me write a supersimple iOS app?

[dronefriend]

I need an app that does one thing: toggle between a .gif and a jpg/png upon clicking somewhere on the screen. Showing fullscreen all the time. No buttons needed. No text. Can use local resources (no need for internet access).

When launching, the app can show either the .gif or the png.

I tried some time ago but could not get it to work. In my novice mind it shouldn’t be that hard, but I couldn’t wrap my head around it.

Anyone interested in helping me? Would be greatly appreciated! I have xCode and I am on iOS 11.