i mean that i want a machine gun that shoot bullets!! Rapidly
well now, you'll need to be a little bit more specific. we're not here to make your game for you <img src="smileys/smiley2.gif" border="0" align="middle" />
but i assume you're looking for a way to spawn bullets rapidly. you don't need the every tick condition. use use "when keyboard/mouse down" and a system-->every x seconds as well. set the seconds to (0.1) and it will fire 10 rounds a second.
I'm too lazy to make my own example, so I just took Weishaupt's example (sorry <img src="smileys/smiley17.gif" border="0" align="middle" />) and modified it to control the fire rate. here ya go: mediafire.com