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EtherTransfer.sol

pragma solidity ^0.4.0;

contract EtherTransferTo {
    // fallback function no argument no return value
    function() public payable {
    }
    
    function getBalance() public view returns (uint) {
        return address(this).balance;
    }
}

// Sending Ether from one contract to another
contract EtherTransferFrom {
    EtherTransferTo private _instance;
    
    constructor() public {
        _instance = new EtherTransferTo();
    }
    
    function getBalance() public view returns (uint) {
        return address(this).balance;
    }
    
    function getBalanceOfInstance() public view returns (uint) {
        //return address(_instance).balance;
        return _instance.getBalance();
    }
    
    // Transfer all money to EtherTransferTo contract
    function() public payable {
        address(_instance).transfer(msg.value);
    }
    
}