Enable and Disable a Script BUTTON PRESS

Hello does anyone know how to enable and disable a script when pressing a button?

For example pressing and holding the SPACEBAR will enable Bloom, and releasing the SPACEBAR will disable the Bloom.

keypress space --------and----------property=True
(same keypress space)-----nand------property=False

if property changed --and-----------bloom on
if property True-----------/

if property changed ----and-------------Bloom off
if property False-----------/

Keypress space in true and false mode.

Thank you BluePrint and you to Monster I will definitely read the Guide you two are awesome.

Bloom is a 2d filter, ran by a actuator, so in this case,

you can use positive pulse to turn the actutor (add bloom on)

and negitive pulse to turn the actuator (add bloom off)