Why doesent my code get executed?

Also, that for loop should look more like this if you want it to run "SpawnNumber" times.:

 for(int i = 0; i < SpawnNumber; i++)

You can read more about for loops here

You have some other issues in your code, as well as much potention for improvement.

your line if(Pos == 50) will never execute because the max value of Random.Range with integer parameters is exclusive. So it can only return values in the range of "0-49".

When you want to check a range you can simply do

 if (Pos >=10 && Pos <=19)

Or in case of a chain like yours you can simply use else if like this:

 if (Pos < 10)
 {
 }
 else if(Pos < 20)
 {
 }
 else if(Pos < 30)
 {
 }
 // ...

Though it would be much better to use an Array of Transforms for your spawn points and just use the random value as index into that array.

You should never use "==" in a for loop. Your loop will only run when "SpawnNumber" is exactly "0". Any other value would skip the whole loop. The loop runs as long as the condition is true. Your condition is only true when i == SpawnNumber. Since i starts at 0 SpawnNumber has to be 0 as well. So the whole loop makes no sense. It's just the same as doing:

 if (SpawnNumber == 0)

You probably want this:

 for(int i = 0; i < SpawnNumber; i++)

This will iterate the loop "SpawnNumber" times.

(ps Wenn du Probleme hast meine Antwort zu verstehen, sag' bescheid -.-. Otherwise stick to english).

Thanks a lot!