pragma solidity ^0.4.19;

contract Hellhole {

uint constant minimum_click_amount = 1 finney;

uint constant last_n_payouts = 100;

uint constant click_time_extension = 24 hours;

struct Click {

address sender;

uint amount;

bool paid;

}

LastNBid[last_n_payouts] public payouts;

uint public next_payout_pointer = 0;

uint public end_time;

uint public pot = 0;

function Hellhole() public payable {

end_time = now + click_time_extension;

//Summon Moloch with a sacrifice of money

pot += msg.value;

}

function click() public payable {

require(now <= end_time);

require(msg.value >= minimum_click_amount);

end_time = now + click_time_extension;

pot += msg.value;

payouts[next_payout_pointer] = LastNBid({

sender: msg.sender,

amount: msg.value,

paid: false

});

next_payout_pointer = (next_payout_pointer + 1) % last_n_payouts;

}

function withdraw() public {

require(now > end_time);

uint lastSendersTotal = 0;

uint senderAmount = 0;

for(uint8 i = 0; i < last_n_payouts; i++){

lastSendersTotal += payouts[i].amount;

if(!payouts[i].paid && payouts[i].sender == msg.sender){

senderAmount += payouts[i].amount;

payouts[i].paid = true;

}

}

uint winnings = (pot * senderAmount) / lastSendersTotal;

msg.sender.transfer(winnings);

}

}