need help [for anti bot]

[cjerick]

just wondering, anyone here know's how to make an anti-bot system.

here's the description:
-when a person is afk or he/she doesn't move or god afked 30min or more a window will pop-up filled with random questions or captcha that needed to be answered and when got wrong for 3 consecutive times the character is force to log out or warp directly to prison.
-also, it has a limited time to answer or less he/she will have a 1 wrong attemp.

Ps.: if my post is in the wrong section don't delete let me inform so i will repost it to the right thread. thanks!

[sandbox]

Try this, though i'm guessing there would be logical errors, as i've not tested it in-game.

-	script	sample	-1,{


OnPCLoginEvent:
CheckAFK:
	sleep2 1800000;
	if(checkidle() > 1800) {
		@Tries = 3;
		Captcha:
			mes "Input the text below:";
			@CapRand$ = .Captcha[rand(getarraysize(.Captcha$))];
			mes @CapRand$;
			mes "You have 1 minute to answer, and "+@Tries+" left.";
			@Timer = gettimetick(2)+60;
			input @Captcha$;
			if(@CapRand$ != @Captcha$ || @Timer > gettimetick(2)) {
				mes "You have entered the wrong captcha, or failed to answer it within a minute";
				@Tries--;
				if(@Tries < 1) {
					next;
					mes "You have exceeded the maximum tries, you will now be logged off.";
					atcommand "@kick "+strcharinfo(0);
				}
				next;
				goto Captcha;
			}
			mes "Thank you for cooperating, and sorry for the inconvenience.";
			close2;
	}
	goto CheckAFK;
end;

OnInit:
	setarray .Captcha$[0],"Test1","Test2","Test3";
	end;

}