function payDay() external {
        require(block.timestamp >= nextPayDay);
        nextPayDay = block.timestamp.sub((block.timestamp - 1538388000).mod(7 days)).add(7 days);
        emit LogGift(top[1].addr, top[2].addr, top[3].addr);
        for (uint i = 0; i <= 2; i++) {
            top[i+1].addr.transfer(2 ether / 2 ** i);
            top[i+1] = Leader(0x0, 0);
        }
    }