How to organize a (crowd) sale with ethereum!

[BrickShares]

I want to organize a crowdsale with ethereum with the next features:
-I want a very low minimum of coins to sell maybe just for 10ETH but i don't want the crowdsale to stop while 10ETH is reached what code can i use for this!
So min 10 ETH and max 10.000 ETH
-The crowdsale will take 30 days. The first 5 days 100% bonus but a min investment off 1 ETH, 6-10 days 75% bonus, 11-15 days 70% bonus, 16 to 20 days 65% bonus, 21 to 25 days 60% bonus 26 to 30 days 50% bonus!
-all none solld coins will go back to the creator!

- Is there anyway you can organize it like a normal sale so customer receives token and i receive the ether right away?
-Is it smart to keep 51% of the tokens on another wallet so that nobody can hijack the project?
-Is there a posibilty to airdrop a new coin under all holders of this coin in the future?

Thanks a lot guys!

[BrickShares]

I want to organize a crowdsale with ethereum with the next features:
-I want a very low minimum of coins to sell maybe just for 10ETH but i don't want the crowdsale to stop while 10ETH is reached what code can i use for this!
So min 10 ETH and max 10.000 ETH
-The crowdsale will take 30 days. The first 5 days 100% bonus but a min investment off 1 ETH, 6-10 days 75% bonus, 11-15 days 70% bonus, 16 to 20 days 65% bonus, 21 to 25 days 60% bonus 26 to 30 days 50% bonus!
-all none solld coins will go back to the creator!

- Is there anyway you can organize it like a normal sale so customer receives token and i receive the ether right away?
-Is it smart to keep 51% of the tokens on another wallet so that nobody can hijack the project?
-Is there a posibilty to airdrop a new coin under all holders of this coin in the future?

Thanks a lot guys!

Guys i would really appriciate an answer!?

[silvergoldandbitcoin]

You can modify one of these standards:

https://github.com/OpenZeppelin/zeppelin-solidity/tree/master/contracts/crowdsale

[BrickShares]

You can modify one of these standards:

https://github.com/OpenZeppelin/zeppelin-solidity/tree/master/contracts/crowdsale

Thanks a lot but for a simple sale wich one do i use?
    CappedCrowdsale.sol    sanity check for CappedCrowdsale: cap > 0    a month ago
   Crowdsale.sol    Change crowdsales to use timestamps instead of block numbers #350    22 days ago
   FinalizableCrowdsale.sol    Remove confusing comment left from FinalizableCrowdsale    5 days ago
   RefundVault.sol    fix references to SafeMath in crowdsale contracts    2 months ago
   RefundableCrowdsale.sol    sanity check for RefundableCrowdsale: goal > 0

Does anyone have a good contract script example?