const fs = require('fs/promises');

(async () => {
  const input = await fs.readFile("./input.txt", 'utf8');

  const simplified = input.replace(/noop/g, '0').replace(/addx (.*)/g, '0\n$1').split("\n").map(s => parseFloat(s));

  const cycleValues = simplified.reduce((vals, change, i) => {
    vals.push(vals[i] + change);
    return vals;
  }, [1]);

  console.log(cycleValues);
  while(cycleValues.length) {
    const row = cycleValues.splice(0, 40);
    console.log(row.map((pos, i) =>
      pos >= i - 1 && pos <= i + 1 ? "X" : "."
    ).join(""))
  }

})();