Print a taproot signalling block diagram

taproot.sh

#!/bin/bash
BLOCKCHAININFO=`bitcoin-cli getblockchaininfo`
TAPROOT=`echo $BLOCKCHAININFO | jq .softforks.taproot.bip8`
SINCE=`echo $TAPROOT | jq .since`
ELAPSED=`echo $TAPROOT | jq .statistics.elapsed`
color_green='\033[0;32m'
color_red='\033[0;31m'
for BLOCK in $(seq $SINCE $((SINCE + ELAPSED - 1))); do
  HASH=`bitcoin-cli getblockhash $BLOCK`
  HEADER=`bitcoin-cli getblockheader $HASH`
  VERSION=`echo $HEADER | jq .version`
  SIGNAL=$(((VERSION & 4) == 4))
  case $SIGNAL in
    (1) printf "${color_green}T";;
    (0) printf "${color_red}_";;
  esac
  if (( ($BLOCK + 1) % 72 == 0 )); then printf "\n"; fi
done
echo