Try this one,matty's one had a litle bugs

main()
{
thread put();
thread key();

}

put()
{

a2=getent("a2","targetname");
placea2=getent("placea2","targetname");
b1=getent("b1","targetname");
b2=getent("b2","targetname");

while(1)
{

placea2 waittill("trigger",user);

if (isDefined(user.key))
{

a2 show();
a2 movez (-30,7,1.9,1.9);
a2 waittill ("movedone");
a2 hide();
wait(1);
b1 movey(64,2,0.5,0.5);
b1 waittill ("movedone");
b2 movey(-64,2,0.5,0.5);
b2 waittill ("movedone");
wait(1);
}
else
{
user iprintlnbold("You dont have the key ... ");
}
}

}
key()
{

a1=getent("a1","targetname");
a2=getent("a2","targetname");
placea2=getent("takea1","targetname");

while(1)
{

placea2 waittill ("trigger",user);


if(!isDefined(user.key))
{
user iprintln(user.name + "^7: I have took the ^1red key^7 now i can open the door!");
user.key = true;
a1 hide();
wait(0.1);
a2 hide();
wait (1);
}
else
user iprintlnbold("You have already this key");

}
}

Or you can try this one:

main()
{
	takea1=getent("takea1","targetname");
	takea1 thread key();
	
	placea2=getent("placea2","targetname");
	placea2 thread put();
}

key()
{
	a1=getent("a1","targetname");
	a2=getent("a2","targetname");
	
	for(;;)
	{
		self waittill ("trigger", user );
		
		if( isPlayer( user ) )
		{
			user.done = undefined;
			
			while( isAlive( user ) && user isTouching( self ) )
			{
				user iprintln( user.name + "^7: You have taken the ^1red key^7 now you can open the door!" );
				a1 hide();
				wait(0.1);
				a2 hide();
		
				user.done = true;
				wait 1;
			}
		}
		
	}
}


put()
{
	a2=getent("a2","targetname");
	b1=getent("b1","targetname");
	b2=getent("b2","targetname");
	
	for(;;)
	{
		self waittill( "trigger", user );
		
		if( isPlayer( user ) )
		{
			while( isAlive( user ) && user isTouching( self ) && isdefined( user.done ) )
			{
				a2 show();
				a2 movez (-30,7,1.9,1.9);
				a2 waittill ("movedone");
				a2 hide();
				wait(1);
				b1 movey(64,2,0.5,0.5);
				b1 waittill ("movedone");
				b2 movey(-64,2,0.5,0.5);
				b2 waittill ("movedone");
				
				user.done = undefined;
				wait 1;
			}
			else 
			{
				user iprintln( user.name + "^7: ^3You haven't got the ^1red key^7!!");
				user.done = undefined;
			}
		} 

	}
}

lol , very thx demonseed , ur script is too advanced :P anyway with the help of pwner we done it but thx

But PAWNER's script has no check for what entity "user" is. You could drive a tank over the trigger and it would still trigger.

Also, if "user" is a player, there is no check for whether "user" is alive. If they get killed while in the trigger, user.key would still be boolean, but wouldnt be able to trigger placea2.

no problem lol atm this script is not important for me , i just was trying to use the ''if things'' that's all this script is just a little test

LOLOLOLOLOLOLOLOLOL...xD

1 My name is PwN3R NOT PAWNER
2Why that poo-poo?both scripts are useful
3LMFAO

lol pwner.

PwN3R writes...

Why? Because getting the script right the first time avoids problems later on. I pointed out the problems in your script, so as to help the OP avoid headaches later on.

A script which is buggy, or which will incur problems later on, is not "useful" to anyone.

This is nothing personal. It's solid, sound adivice from a professional software engineer, who codes for a living. Lets keep the kiddie comments out of it, eh?