function Mind() 
{ 
	
	this.newRun = function()                  
	{
	    
	};


    this.getAction = function ( x )         // x is an array of [ ai, aj, ei, ej ]
    { 
        var ai = x[0];
        var aj = x[1];
        var ei = x[2];
        var ej = x[3];

            if (ai == 1)
            {
              if ( ej < aj )         return ( AB.randomPick ( ACTION_UP,   ACTION_RIGHT     ));
              if ( ej > aj )         return ( AB.randomPick ( ACTION_DOWN, ACTION_RIGHT     ));
              else                   return ( AB.randomPick ( ACTION_RIGHT,   AB.randomPick(ACTION_UP,ACTION_DOWN)    ));
            }
            if (ai == 18)
            {
              if ( ej < aj )         return ( AB.randomPick ( ACTION_UP,   ACTION_LEFT      ));
              if ( ej > aj )         return ( AB.randomPick ( ACTION_DOWN, ACTION_LEFT      ));
              else                   return ( AB.randomPick ( ACTION_LEFT,   AB.randomPick(ACTION_UP,ACTION_DOWN)    ));
            }
            if (aj == 1)
            {
              if ( ei < ai )         return ( AB.randomPick ( ACTION_UP,   ACTION_RIGHT     ));
              if ( ei > ai )         return ( AB.randomPick ( ACTION_UP,   ACTION_LEFT      ));
              else                   return ( AB.randomPick ( ACTION_UP,   AB.randomPick(ACTION_RIGHT,ACTION_LEFT)    ));
            }
            if (aj == 18)
            {
              if ( ei < ai )         return ( AB.randomPick ( ACTION_DOWN,   ACTION_RIGHT   ));
              if ( ei > ai )         return ( AB.randomPick ( ACTION_DOWN,   ACTION_LEFT    ));
              else                   return ( AB.randomPick ( ACTION_DOWN,   AB.randomPick(ACTION_RIGHT,ACTION_LEFT)    ));
            }
        //    if (ai == 1)           return ( AB.randomPick ( AB.randomPick(ACTION_UP, ACTION_DOWN),     ACTION_RIGHT     ));
        //    if (ai == 18)          return ( AB.randomPick ( AB.randomPick(ACTION_UP, ACTION_DOWN),     ACTION_LEFT      ));
        //    if (aj == 1)           return ( AB.randomPick ( AB.randomPick(ACTION_LEFT, ACTION_RIGHT),  ACTION_UP        ));
        //    if (aj == 18)          return ( AB.randomPick ( AB.randomPick(ACTION_LEFT, ACTION_RIGHT),  ACTION_DOWN      ));
        //    if strictly move away, will get stuck at wall, so introduce randomness 
            if ( ej < aj )         return ( AB.randomPick ( ACTION_UP,     AB.randomPick(ACTION_RIGHT,ACTION_LEFT)      ));
            if ( ej > aj )         return ( AB.randomPick ( ACTION_DOWN,   AB.randomPick(ACTION_RIGHT,ACTION_LEFT)      ));
            if ( ei < ai )         return ( AB.randomPick ( ACTION_RIGHT,  AB.randomPick(ACTION_UP,ACTION_DOWN)         )); 
            if ( ei > ai )         return ( AB.randomPick ( ACTION_LEFT,   AB.randomPick(ACTION_UP,ACTION_DOWN)         )); 

            return  ( AB.randomIntAtoB (0,3) );
        };

		 
	this.endRun = function()                 
	{
	};
}

//AB.clockTick       = 100;
//AB.maxSteps        = 1000;
//AB.screenshotStep  = 50;