Update README.md

README.md

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-# hush-smart-chains
-Hush Smart Chains - The z2z Platform
+# Hush Smart Chains - The z2z Platform
+
+Hush Smart Chains are a way to create Zcash Protocol Proof-of-Work chains, with a focus on fully-shielded (z2z) chains for
+maximums privacy.
+
+## Creating a Hush Smart Chain
+
+As an example, we will make a replica of the cryptocoin Pirate (ARRR) in a single command:
+
+```
+hush-smart-chain -ac_name=ARRRUKIDDING -ac_supply=0 -ac_halving=388885 -ac_private=1 -ac_reward=25600000000
+```
+
+This replica has exactly the same mining schedule as PIRATE as well as block reward. One notable exception
+is that all Hush Smart Chains are Pure Sapling, which means no 1.6GB download would be required to sync
+the `ARRRUKIDDING` chain.