Helloworld in hyperledger using GO SDK

I have been following up hyperledger helloworld mentioned in [login to view URL] website. It just puts and gets key values from Blockchain. Its using GO SDK. I have understood some of its parts but I have some confusions. Need someone to clarify working of the code. Wont take you more than 2 hours to clarify everything if you've worked a little in hyperledger. I personally have coding skills so just need someone to get me going with this.