function updateTokenStatus() public
    {
        
        
        if(now < crowdfundDeadline){                       
            tokensFrozen = true;         
            LogTokensFrozen(tokensFrozen);  
        }  

        
        if(now >= nextFreeze){          
            tokensFrozen = true;
            LogTokensFrozen(tokensFrozen);  
        }

        
        if(now >= nextThaw){         
            tokensFrozen = false;
            nextFreeze = now + 12 * 1 weeks;
            nextThaw = now + 13 * 1 weeks;              
            LogTokensFrozen(tokensFrozen);  
        }        
      
    }