Spawning random type of enemies?

Hello, currently me and my friend are working on our first project and it is Tower Defense type game.

We got some core mechanics and graphics but now we got a little problem. I want to spawn different enemies based on the current attack wave.

For example:

Wave 1 to 5 only type 1 enemies, but when it goes to wave 6-10 I want there to be 20% chance to spawn type 2 enemy and 80% of spawning type 1 enemy. I just don't know how to implement that type of spawning enemies.. Also couldn't find any topics with that kind of problem.

Thanks :)

see Families tutorial and Space Blaster game examples you can find it Costruct2\examples

I checked it but I haven't bought the license yet and I can't use families.

I think you need to buy . :D

Create a spawnWave(waveNumber) function with waveNumber as a parameter.

In the function, create events for if waveNumber = x, then spawn whatever.