Stuck in a loop

integer d_permacq = FALSE;
key d_agent = NULL_KEY;
string animation;

default 
{
    state_entry() 
    {
        llSitTarget(<0, 0, 1>, ZERO_ROTATION); // needed for llAvatarOnSitTarget to work
        // Note that if both the vector and the rotation are zero,
        // the SitTarget is removed instead of set and the following will not work:
                
    }
    
    changed(integer change) 
    { // something changed
        if (change & CHANGED_LINK) 
        { // and it was a link change
            key agent = llAvatarOnSitTarget();
            if (d_agent == NULL_KEY && agent != NULL_KEY) 
            { // somebody is sitting on me
                d_agent = agent;
                llRequestPermissions(agent,PERMISSION_TRIGGER_ANIMATION);
                //llSleep(0.5);
                //llRequestPermissions(agent, PERMISSION_TAKE_CONTROLS); // get permission to take controls
                llSay(0, "Welcome to Dance Dance Second Life!");
            }
            else if (d_agent != NULL_KEY && agent == NULL_KEY) 
            {
                //user is getting up
                if (d_permacq) 
                {
                    //restore anims
                    llStopAnimation(animation);
                }
                
                //reset the script to release permissions
                llResetScript();
            }
            
        }
    }
    
    run_time_permissions(integer parm) 
    {
        if (parm == PERMISSION_TAKE_CONTROLS)
        { // we got a yes
            llTakeControls(CONTROL_FWD | CONTROL_BACK | CONTROL_ROT_LEFT | CONTROL_ROT_RIGHT, TRUE, FALSE); // take left,right, Forward, and back controls
        }
        if(parm == PERMISSION_TRIGGER_ANIMATION) 
        {
            
            //set permission flag
            d_permacq = TRUE;
            
            //cancel the sit anim
            llStopAnimation("sit");
            
            llStartAnimation("dance start");
            animation = "dance start";
            llRequestPermissions(llGetOwner(), PERMISSION_TAKE_CONTROLS); // get permission to take controls
        }
    }
    control(key id, integer level, integer edge)
    { // something happened to one of our controls
        key agent = llAvatarOnSitTarget();
        llRequestPermissions(agent,PERMISSION_TRIGGER_ANIMATION);
        if ((edge & level & CONTROL_FWD))
        { // the "forward" key is held
            llStopAnimation(animation);
            llStartAnimation("dance left f");
            animation = "dance left f";
        }
        else if ((edge & level & CONTROL_BACK))
        {// the "back" key was pressed
            llStopAnimation(animation);
            llStartAnimation("dance right b");
            animation = "dance right b";
        }
        else if ((edge & level & CONTROL_ROT_LEFT))
        { // The "left" key was pressed
            llStopAnimation(animation);
            llStartAnimation("dance left l");
            animation = "dance left l";
        }
        else if ((edge & level & CONTROL_ROT_RIGHT))
        {// The "right" key was pressed
            llStopAnimation(animation);
            llStartAnimation("dance right r");
            animation = "dance right r";  
        }
        else
        {
            llStopAnimation(animation);
            llStartAnimation("dance start");
            animation = "dance start";  
        }
    }    
}

llRequestPermissions(agent, PERMISSION_TAKE_CONTROLS | PERMISSION_TRIGGER_ANIMATION);