pragma solidity ^0.5.12;
contract yourToken{
    address public minter;
    mapping (address => uint) public balances; //mapping (key=>value) accessmodifier mapping name
    event Sent(address from, address to, uint amount);
    
      constructor() public {
        minter = msg.sender; 
    }
    function mint(address receiver, uint amount) public {
        if(msg.sender != minter) return;
        balances[receiver]+=amount;
    }
function send(address receiver, uint amount) public {
        if(balances[msg.sender] < amount) return;
        balances[msg.sender]-=amount;
        balances[receiver]+=amount;
        emit Sent(msg.sender, receiver, amount);

        
}
}