code

#include <a_samp>

new count;
new timer;

main(){}

public OnGameModeInit()
{
	SetGameModeText("TIMER");
	AddPlayerClass(0, 1958.3783, 1343.1572, 15.3746, 269.1425, 0, 0, 0, 0, 0, 0);

	count = (gettime() + 36000);

	//

	timer = SetTimer("UpdateTimer", 1000, true);
	return 1;
}

forward UpdateTimer();
public UpdateTimer()
{
	if(!--count)
	{
	    KillTimer(timer);
	}
	new hh, mm, ss;

	Convert(count - gettime(), hh, mm, ss);
    printf("TIMER: %d:%d:%d", hh, mm, ss);
	return 1;
}

Convert(seconds, &hh = 0, &mm = 0, &ss = 0)
{
	hh = seconds / (60 * 60);
	mm = (seconds % (60 * 60)) / 60;
	ss = (seconds % (60 * 60)) % 60;
	return 1;
}