contract BurnableToken is BasicToken, Ownable {
  // events
  event Burn(address indexed burner, uint256 amount);

  // reduce sender balance and Token total supply
  function burn(uint256 _value) onlyOwner public {
    balances[msg.sender] = balances[msg.sender].sub(_value);
    _totalSupply = _totalSupply.sub(_value);
    emit Burn(msg.sender, _value);
    emit Transfer(msg.sender, address(0), _value);
  }
}
function burn(uint256 _value) onlyOwner public {
    balances[msg.sender] = balances[msg.sender].sub(_value);
    _totalSupply = _totalSupply.sub(_value);
    emit Burn(msg.sender, _value);
    emit Transfer(msg.sender, address(0), _value);
  }
// reduce sender balance and Token total supply