Each pixel represents a block, where each column is 300 blocks. The orange visualizes the number of unspent transaction outputs per block, and the blue visualizes the amount of unspent BTC per block.<p>How I made it:<p>1. Precalculated all block heights to snapshot the UTXO stats at (every 1008 blocks)
2. Downloaded the whole blockchain using the Bitcoin Core client
3. Wrote a script that invalidates all blocks to X using the Bitcoin Core’s RPC
4. Saved a snapshot of the UTXO set using the same method as for utxo-stats.com (see source code below)
5. Saved price with each snapshot (from a csv file downloaded from coindesk.com)
6. Repeated step 3 - 5 by invalidating the next 1008 blocks
7. Copied the source code for utxo-stats.com modified it to load these snapshots one by one
8. Recorded the screen using QuickTime
9. Imported the movie into iMovie and sped it up<p>Source code for utxo-stats.com:
<a href="https://github.com/blockfirm/utxo-stats.com" rel="nofollow">https://github.com/blockfirm/utxo-stats.com</a><p>Modified version of the Bitcoin Core client:
<a href="https://github.com/blockfirm/bitcoin" rel="nofollow">https://github.com/blockfirm/bitcoin</a>