I got it so when the player walks over the bomb icon it adds 1 to the variable and I also have it set so when I press the "D" key it spawns the exploding bomb and subtracts 1 from the variable but when I still press the "D" Key it keeps spawning bombs and I can't figure out how to stop allowing the use of bombs

I've searched the forums and I couldn't find any help and I'm new to Construct.

I want to make a game where the player collects bombs and can plant them where ever to destroy things blocking paths. But I want it so I can only drop a bomb after the player collides with the icon on screen.

I've played with the events/ variables for hours and after the player collects one bomb it's like they now have unlimited. How can I make the player just drop one until the player gets another one?

Thank you!

p.s - I want the player to press the "D" key on the keyboard to drop the bomb