For anyone interested in getting started with Solidity in 20-30 mins, one of the languages that Ethereum contracts can be coded in (some analogize this language to JS, the other language is Serpent which is compared to Python), you can see a quick primer I put together:

https://learnxinyminutes.com/docs/solidity/

You can test your code here:

https://ethereum.github.io/browser-solidity/#version=soljson...