I totally forgotten to show, how I solved this grin :

Code:
action my_player
{
	...
	on_mouse_left = handle_attack;
	if(mouse_left_pressed>1)
	{
		var player_combo_react_time = 0; 
		while(player_combo_react_time < 5)
		{
			player_combo_react_time += 1 * time_step;
			
			wait(1);
		}
		mouse_left_pressed = 0;
	}
...
}


and here is handle attack for two attacks a row:

Code:
function handle_attack()
{
	if(player.animaten_mode == 2)
	{
		if (mouse_left_pressed == 0)
		{
			var attack_percentage = 0;
			while(attack_percentage < 100)
			{
				ent_animate(player,NULL,0,0);
				ent_animate(player,"oneh_attack_a",attack_percentage,ANM_ADD);
				attack_percentage += 10 * time_step;
				mouse_left_pressed = 1;
				mouse_left = 0;
			if(attack_percentage>50 && attack_percentage<85) {player.attacking = 1;}else{player.attacking = 0;}
				wait (1);
			}
			player.attacking = 0;
			mouse_left = 0;
			mouse_left_pressed = 2;
		}
		if (mouse_left == 1 && mouse_left_pressed == 2)
		{
			var attack_percentage = 0;
			while(attack_percentage < 100)
			{
				ent_animate(player,NULL,0,0);
				ent_animate(player,"oneh_attack_b",attack_percentage,ANM_ADD);
				attack_percentage += 10 * time_step;
				mouse_left_pressed = 2;
				mouse_left = 0;
			if(attack_percentage>5 && attack_percentage<60) {player.attacking = 1;}else{player.attacking = 0;}
				wait (1);
			}
			player.attacking = 0;
			mouse_left = 0;
			mouse_left_pressed = 0;//if you write mouse_left_pressed = 2, you can add easily more attacks 
		}
	}
}