aoc2022/d10/part2.awk

function inc() {
	i = (c%40)
	r = r ((i==x||i==x+1||i==x+2) ? "█" : " ")
	if (i == 39) {
		print r
		r = ""
	}
	c++
}
{ inc() }
$1 == "addx" {
	inc()
	x+=$2
}