How do I make a cooldown for a weapon?

I am fairly new to construct, I was wondering if anyone could help me out with this. I followed the beginners tutorial for the ghost shooter game and have added in two new weapons. You change weapons when you press space. It adds a number to a variable that resets after it gets to 2. The regular gun is 0, flamethrower is 1 and bomb is 2. The bomb is fairly overpowered so far, so I tried to put a cooldown on it by using a variable that gets added to when the bomb is used. Another event senses when the variable is added to, waits 3 seconds, then minuses the number from the variable, setting it back to 0. It works once at the start, then allows the player to throw bombs without a cooldown. I will attach a picture to this thread message thing, can someone please tell me what I'm doing wrong?

Player start "endCooldown" timer for 3 seconds

Where is this command in the add 'Player' action menu?

You can do it like this...

dropbox.com/s/hf6h3492w9vuwb8/CooldownTimer.c3p

Where is this command in the add 'Player' action menu?

You need to add Timer behavior to the player.

If you're entirely new to Construct, check out my youtube tutorials :

youtube.com/channel/UCZ6QjvqEs9dR2miRnfFqIpQ

You will find a lot of useful info on how to make a lot of games

Hope that helps

Thanks everyone for your help!