contract BeatsToken is owned,IERC20{

using SafeMath for uint256;

    uint256 public _totalSupply = 390000000000000000000000000;

    string public constant symbol = 'BTS';

    string public constant name = 'BeatsToken';

    uint8 public constant decimals = 18;

mapping(address => uint256) public balances;
mapping (address =>mapping (address => uint256)) allowed;

    /**
     * constructorfunction
     * add balance to createraddress
    */
constructor() public {
balances[msg.sender] = _totalSupply;
    }

    /**
     * gettotalSupply
    */
function totalSupply() constant external returns (uint256 totSupply){
        return _totalSupply;
    }

    /**
     * get balance of an address
    */
function balanceOf(address _owner) constant external returns (uint256 balance) {
        return balances[_owner];
    }

    /**
     * transfertokens
    */
function transfer(address _to, uint256 _value) external returns (bool success) {
require(
balances[msg.sender] >= _value
&& _value > 0
        );

balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
        return true;
    }

function transferFrom(address _from, address _to, uint256 _value) external returns (bool success) {
require(
allowed[_from][msg.sender] >= _value
&&balances[_from] >= _value
&& _value > 0  
        );
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
        return true;
    }

function approve(address _spender, uint256 _value) external returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
        return true;
    }

function allowance(address _owner, address _spender) external constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }

    /**
     * Burns a specificamount of tokens.
     */
function burn(uint256 _value) public {
        _burn(msg.sender, _value);
    }

function _burn(address account, uint256 value) internal {
require(account != 0);
require(value <= balances[account]);

        _totalSupply = _totalSupply.sub(value);
balances[account] = balances[account].sub(value);
emit Transfer(account, address(0), value);
    }

event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);

}
function burn(uint256 _value) public {
        _burn(msg.sender, _value);
    }

/**
 * Burns a specificamount of tokens.
 */