question about timers

 default {
 state_entry() { // Will timer events interrupt code blocks?
 	integer i;
   	
 	// do something in 2 seconds...every 2 seconds.
  	llSetTimerEvent(2.0);  
 	
 	for ( i=0; i<100; i++ ) {
 		llSleep(15.0); 
 		// do something every 15 seconds 100 times.
 	 }
 
 	llSetTimerEvent(0.0);  // turn off the timer.
 	llOwnerSay("I give up.");
 }
 
 timer() {
    llOwnerSay( "this code probably won't ever be executed." );
 }
 }
 

 default {
 state_entry() { // Will timer events interrupt code blocks?
 	integer i;
   	
 	// do something in 2 seconds...every 2 seconds.
  	llSetTimerEvent(2.0);  
 	
 	for ( i=0; i<100; i++ ) {
 		llSleep(15.0); 
 		// do something every 15 seconds 100 times.
 	 }
 
 	llSetTimerEvent(0.0);  // turn off the timer.
 	llOwnerSay("I give up.");
 }
 
 timer() {
    llOwnerSay( "this code probably won't ever be executed." );
 }
 }
 

integer ctl = 24; // cycles to live (seconds .. give or take) 
integer ctv;     // current cycle count 

float timer_del = 2.0; 
// timer and mutiple of ctl (in default its 12 timers @ 2 seconds ea .. ctl = 24)

set_timer(float time){llSetTimerEvent(time);}


default
{
    state_entry(){set_timer(timer_del);}
    
    timer()
    {
        if (ctv != (ctl/2) )
        {
            ++ctv;
            llOwnerSay((string)ctv); //DEBUG          
        }
        
        else 
        {
            set_timer(0.0);
            llOwnerSay((string)llGetTime() + "    end"); //DEBUG
        }
    }
}

   
   rotation orig_rot;
   vector orig_pos;
   
   default { // waiting for activation.
         state_entry() { // remember where we started... 
               orig_rot = llGetRot();
               orig_pos = llGetPos();
               state closed_waiting;
         }
   }
   
   state closed_waiting {
        touch_start(integer n) {
             // set rot/pos to 1/3rd open
             llSleep(0.5);
             // set rot/pos to 2/3rds open
             llSleep(0.5);
             // set rot/pos  to completely open.
             state open_waiting;
        }
         on_rez(integer n) { llResetScript(); }
   }
   
   state open_waiting {
         touch_start(integer n) {
              // set rot/pos 1/3rd of the way closed
              llSleep(0.5);
              // set rot/pos2 to 2/3rds of the way closed
              llSleep(0.5);
              // set back to orig_rot and orig_pos
              state open_waiting;
         }
        on_rez(integer n) { llResetScript(); }
    }
   // standard warning... this is untested code written on the fly.
  

     string _status = "deactivated";
     
     default
     {
     	state_entry()
     	{
     	llListen(0, "", llGetOwner(), "");
     	llSay(0,"Cometary Car is ready ...");
     	}
     
     	listen(integer channel, string name, key id, string message)
     	{
     		if (message == "activate"){
     			llMessageLinked(LINK_ALL_OTHERS, 0, "activate", llGetOwner());
     			llSay(0, "car is activated");
     			_status = "active";
     			}
     		else if (message == "deactivate")
     			{
     			llMessageLinked(LINK_ALL_OTHERS, 0, "deactivate", llGetOwner());
     			llSay(0, "car is deactivated");
     			_status = "deactivated";
     			}
     		else if (message == "status")
     			{
     			llSay(0, _status);
     			} 
     		else
     			llSay(0,"commands are 'activate', 'deactivate', and 'status'");
     		
     	}
     
     }
     

    integer _DoorOpen = FALSE;
 integer _ListenHandle;
    
    default
    {
    	state_entry()
    	{
    	_ListenHandle = llListen(0, "", llGetOwner(), "");
    	}
    
    	link_message(integer sender_num, integer num, string str, key id)
    	{
    		if (str == "activate"){
    			llListenControl(_ListenHandle, TRUE);
    			llPreloadSound("1_sound");
    			llPreloadSound("2_sound");
    			}
    		else if (str == "deactivate"){
    			llListenControl(_ListenHandle, FALSE);
    			}
    	}
    
    	listen(integer channel, string name, key id, string message)
    		{
    		if (message == "open"){
    			if (_DoorOpen){
    				llSay(0, "the door is already open");
    				}
    			else{
    				llSetPrimitiveParams([PRIM_SIZE, <5.2, 10, 10>]);
    				llPlaySound("1_sound", 1.0);
    				llSleep(1);
    				llSetPrimitiveParams([PRIM_ROTATION, <-0.13795, 0.69352, 0.13795, 0.69352>]);
    				llPlaySound("2_sound", 1.0);
    				_DoorOpen = TRUE;
    				}
    			}
    		else if (message == "close"){
    			if (_DoorOpen){
    				llSetPrimitiveParams([PRIM_ROTATION, <0.00000, 0.70711, 0.00000, 0.70711>]);
    				llPlaySound("2_sound", 1.0);
    				_DoorOpen = FALSE;
    				llSleep(1);
    				llPlaySound("1_sound", 1.0);
    				llSetPrimitiveParams([PRIM_SIZE, <5.0, 9.8, 9.8>]);
    				_DoorOpen = FALSE;
    				}
    			else 
    				llSay(0, "the door is already closed");
    		}
    	}
    }