Randomised Parallax Packround in 2d endlesrunner

Godot Version

4.22

Question

i am trying to make an endless runner like jetpack joyride and already have two Paralax packrounds ready in 2 scenes and i am now trying to make these apear rdm in my game like after 30 sec so 1.5 the Backround should change . I am also tying to make obsticuls to fit the theme of the Backrounds so i want to Rdm generate prepuild Backround sets which fit the Backround theme .
Thanks

I have done it with smooth transition change of biome (parallax bg) but I can`t explain this, but I recommend you to learn godot more better or contact me in discord king_game_developer