Waiting For bullets to Collide First

Hello Guys just wanna ask I'm making this some kind of game in which I have a Player which spawn bullet(on Click) to attack it's enemy. What I want to do is I want the player to just spawn 3 bullets in 3 clicks then wait until the bullet collided in the enemy then able to spawn bullets again. Hope you guys get my point. please help thank you :)

So, the player have 3 bullets?, and will get 3 more when they collide with the enemy:

Create a variable on your bullet called something like GiveAmmo. It's number should be 3.

event sheet:

On left click if GiveAmmo is Equal to 1,2,3,   Shoot bullet

When bullet shot,   Subtract 1 from GiveAmmo

When bullet collides with enemy,   Set GiveAmmo to 3.

like that ?