contract MyToken {
    
    /* Public variables of the token */
    string public name;
    string public symbol;
    uint8 public decimals;
    /* This creates an array with all balances */
    mapping (address => uint256) public balanceOf;
    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);
    /* Initializes contract with initial supply tokens to the creator of the contract */
    function MyToken(uint256 _supply, string _name, string _symbol, uint8 _decimals) public{
        /* if supply not given then generate 1 million of the smallest unit of the token */
        if (_supply == 0) _supply = 1000000;
        /* Unless you add other functions these variables will never change */
        balanceOf[msg.sender] = _supply;
        name = _name;
        symbol = _symbol;
        /* If you want a divisible token then add the amount of decimals the base unit has  */
        decimals = _decimals;
    }
    /* Send coins */
    function transfer(address _to, uint256 _value) public{
        /* if the sender doenst have enough balance then stop */
        if (balanceOf[msg.sender] < _value) require(balanceOf[msg.sender] < _value);
        if (balanceOf[_to] + _value < balanceOf[_to]) require(balanceOf[msg.sender] < _value);
        /* Add and subtract new balances */
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;
        /* Notifiy anyone listening that this transfer took place */
        emit Transfer(msg.sender, _to, _value);
    }
}
function MyToken(uint256 _supply, string _name, string _symbol, uint8 _decimals) public{
    /* if supply not given then generate 1 million of the smallest unit of the token */
    if (_supply == 0) _supply = 1000000;
    /* Unless you add other functions these variables will never change */
    balanceOf[msg.sender] = _supply;
    name = _name;
    symbol = _symbol;
    /* If you want a divisible token then add the amount of decimals the base unit has  */
    decimals = _decimals;
}

/* Initializes contract with initial supply tokens to the creator of the contract */