Randomly generated obstacles?

Help Requests
1

For my mobile game that I’m making, Doom Derby, I need to randomly generate obstacles for the player to dodge, but I don’t have a clue on how to. Here’s the link to my game: Doom Derby - Flowlab Game Creator

2

@sand_sloth try this https://www.youtube.com/watch?v=7fPwl5z_MaE