func: function pay() private {
          
          uint128 money = uint128(address(this).balance);
  
          
          for(uint i=currentReceiverIndex; i<queue.length; i++){
  
              Deposit storage dep = queue[i]; 
  
              if(money >= dep.expect){  
                  dep.depositor.send(dep.expect); 
                  money -= dep.expect;            
  
                  
                  delete numInQueue[dep.depositor];
                  delete queue[i];
              }else{
                  
                  dep.depositor.send(money); 
                  dep.expect -= money;       
                  break;                     
              }
  
              if(gasleft() <= 50000)         
                  break;                     
          }
  
          currentReceiverIndex = i; 
      }