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blockchain SimpleToken {
    state {
        mapping(address => uint256) balances;
        uint256 total_supply;
        string name;
    }
    
    constructor(string _name, uint256 _supply) {
        name = _name;
        total_supply = _supply;
        balances[msg.sender] = _supply;
    }
    
    function transfer(address to, uint256 amount) 
        public returns (bool) {
        require(balances[msg.sender] >= amount);
        balances[msg.sender] -= amount;
        balances[to] += amount;
        emit Transfer(msg.sender, to, amount);
        return true;
    }
}