Display an identicons from the last commit hash

identicon.js

var colors = require('colors');
var exec = require('child_process').exec;

exec('git rev-parse HEAD', function(error, stdout, stderr){
  hash = process.argv[2] ? process.argv[2] : stdout
  hash = hash.toString();
  hash = hash.split('');
  var identicons = '',
    on = "  ".zebra.inverse,
    off = "  ".green.inverse,
    sqrt = 7,
    pointer = 1;
  for (var i = 0; pointer < 50; i++) {
    var subhash = parseInt(hash[i],16)
    subhash = subhash.toString();
    subhash = subhash.split('');

    for (var j = 0; j < subhash.length; j++) {

      carret = ''
      if (pointer%sqrt === 0) {
        carret = "\n"
      }
      if (pointer < 50) {
        if (parseInt(subhash[j]) & 1) identicons += on+carret
        else identicons += off+carret
        pointer++
      };
    }
  }
  console.log(identicons);
  done()
})
function done() {process.exit();}