pragma solidity ^0.4.0;

contract FuncConcert {
   
   address owner;
   uint  public tickets;
   uint public constant price =1 ether;
   //diffrent modifier represent value
   // 
   mapping (address => uint) public purchasers;
   
   function FuncConcert(){
       owner = msg.sender;
       tickets =5;
   }
   function () payable{//fallback function
       buyTickets(1);
   }
   function buyTickets(uint amount) payable {
       //msg.value how much ether send this function
       if (msg.value != (amount*price) || amount > tickets){
           throw;
       }
       purchasers[msg.sender] += amount;
       tickets -= amount;
       
       if (tickets==0){
           selfdestruct(owner);
       }
   }
   /*
   function Balance() public returns(uint){
       return this.balance();
   }
   */
   
}