Delay after projectile fire

Hello everyone, I could use some assistance as I am stumped on this.

I built a very simple two player game where opponents are on opposite sides and fire projectiles are each other. I have the movements and collisons all setup, but in order to help the game play I want to delay the player a half-second or so between shots, otherwise the gameplay is less fun. I want to delay the player to shoot again AFTER the projectile has been fired, not a delay from the keyboard pressing to the projectiles firing.

I’ve tried working with the timer and I am can not seem to get it to work, any thoughts would be helpful

make it to where there is a switch and put the imput key’s Up output turns it of and runs a timer to turn it back on, then put the down output into the switch imput and so on