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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);
    }
}

TimeBased.sol

pragma solidity ^0.4.23;

contract TimeBasedWill {
    
    address private _beneficiaries;
    uint private _startTime;
    uint private _expiryTime;
    
    address private owner;
    
    modifier onlyOwner {
        require(msg.sender == owner);
        _;
    }
    
    modifier checkExpiry {
        require(now >= _expiryTime);
        _;
    }
    
    function TimeBasedWill() public payable
    {
        owner = msg.sender;
    }
    
    function approveAddresses(address beneficiaries, uint expiryTime) onlyOwner public
    {   
        _startTime = now;
        _expiryTime = now + expiryTime;
        _beneficiaries = beneficiaries;
    }
    
    function getBalanceOf() public view returns (uint) {
        return _beneficiaries.balance;
    }
    
    function sendMoney() public payable
    {   
        require(now >= _expiryTime);
        
        _beneficiaries.send(msg.value);
        
        // uint numberOfBeneficiaries = _beneficiaries.length;
        // uint shareOfBalance = owner.balance/numberOfBeneficiaries;
        
        // for (uint i = 0; i < numberOfBeneficiaries; i++) {
        //     address beneficiary = _beneficiaries[i];
        //     beneficiary.send(shareOfBalance);
        // }
    }
    
}