Solidity different token price - ethereum

Question

I'm just checking the Solidity code for my school project.
I have a questions about this code:
price = etherCostOfEachToken * 1 ether;
Can I add something like:
(if they send more then 2 ether they have a bonus like the maximum 5000)
If (ether contribution > 2 ether) {
tokenReward.transfer(msg.sender, 5000);
}else{
tokenReward.transfer(msg.sender, amount / price);
}
Is this possible?
pragma solidity ^0.4.2;
contract token { function transfer(address receiver, uint amount){ } }
contract Crowdsale {
address public beneficiary;
uint public fundingGoal; uint public amountRaised; uint public deadline; uint public price;
token public tokenReward;
mapping(address => uint256) public balanceOf;
bool fundingGoalReached = false;
event GoalReached(address beneficiary, uint amountRaised);
event FundTransfer(address backer, uint amount, bool isContribution);
bool crowdsaleClosed = false;
/* data structure to hold information about campaign contributors */
/* at initialization, setup the owner */
function Crowdsale(
address ifSuccessfulSendTo,
uint fundingGoalInEthers,
uint durationInMinutes,
uint etherCostOfEachToken,
token addressOfTokenUsedAsReward
) {
beneficiary = ifSuccessfulSendTo;
fundingGoal = fundingGoalInEthers * 1 ether;
deadline = now + durationInMinutes * 1 minutes;
price = etherCostOfEachToken * 1 ether;
tokenReward = token(addressOfTokenUsedAsReward);
}
/* The function without name is the default function that is called whenever anyone sends funds to a contract */
function () payable {
if (crowdsaleClosed) throw;
uint amount = msg.value;
balanceOf[msg.sender] = amount;
amountRaised += amount;
tokenReward.transfer(msg.sender, amount / price);
FundTransfer(msg.sender, amount, true);
}
modifier afterDeadline() { if (now >= deadline) _; }
/* checks if the goal or time limit has been reached and ends the campaign */
function checkGoalReached() afterDeadline {
if (amountRaised >= fundingGoal){
fundingGoalReached = true;
GoalReached(beneficiary, amountRaised);
}
crowdsaleClosed = true;
}
function safeWithdrawal() afterDeadline {
if (!fundingGoalReached) {
uint amount = balanceOf[msg.sender];
balanceOf[msg.sender] = 0;
if (amount > 0) {
if (msg.sender.send(amount)) {
FundTransfer(msg.sender, amount, false);
} else {
balanceOf[msg.sender] = amount;
}
}
}
if (fundingGoalReached && beneficiary == msg.sender) {
if (beneficiary.send(amountRaised)) {
FundTransfer(beneficiary, amountRaised, false);
} else {
//If we fail to send the funds to beneficiary, unlock funders balance
fundingGoalReached = false;
}
}
}
}

Answer 1

Yes you can do this by modifying your payable method to be something like:
//You can add a constant to save the bonus amount:
uint constant bonus = 5000;
//Inside this method check if amount is larger than 2:
function () payable {
if (crowdsaleClosed) throw;
uint amount = msg.value;
balanceOf[msg.sender] = amount;
amountRaised += amount;
if (amount > 2) {
tokenReward.transfer(msg.sender, amount / price + bonus);
} else {
tokenReward.transfer(msg.sender, amount / price);
}
tokenReward.transfer(msg.sender, amount / price);
FundTransfer(msg.sender, amount, true);
}