2 Spawner Problem

Hi guys I have a Little game and u drive a car and can go left or right to drive away from the “enemys”. So you have too constant ways to stay. Now i have implemented 2 spawner (with an random delay to spawn) for the right and left side of the street. But sometimes they spawn at the same time and the Player has automatic lost. How can I Code or however I can implement that they cant spawn at the same time best with an delay of about 2s. ty for ur answers

You could create a list and add all the new enemy instances to it runtime, then make a function that keeps track of the amount of instances in that list, so that if there is already an enemy in the list it waits a couple of seconds before another enemy gets spawned