From 7c8ee5edcd5dc59f1cce3b0af9dd2c4075e51de3 Mon Sep 17 00:00:00 2001
From: David Ashby <delta.mu.alpha@gmail.com>
Date: Thu, 23 Dec 2021 17:44:25 -0700
Subject: [PATCH] day 20 part 2

---
 20/main.go | 33 ++++++++++++++++++++++++---------
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/20/main.go b/20/main.go
index 183f83a..e30ebab 100644
--- a/20/main.go
+++ b/20/main.go
@@ -144,22 +144,37 @@ func partOne() {
 		y++
 	}
 
-	img.Print()
-	fmt.Println(img.CountBrightPixels())
-	fmt.Println("")
-
 	for i := 0; i < 2; i++ {
 		img = Enhance(img, enhancementString)
-		img.Print()
-		fmt.Println(img.CountBrightPixels())
-		fmt.Println("")
 	}
+	fmt.Println(img.CountBrightPixels())
 }
 
 func partTwo() {
 	scanner := makeScanner(false)
 
-	for scanner.Scan() {
-		// line := scanner.Text()
+	scanner.Scan()
+	enhancementString := scanner.Text()
+	scanner.Scan() // eat empty line
+
+	img := &image{
+		background: '.',
+		grid:       map[coord]rune{},
+		topleft:    coord{0, 0},
 	}
+
+	y := 0
+	for scanner.Scan() {
+		line := scanner.Text()
+		img.size = len(line)
+		for x, c := range line {
+			img.grid[coord{x, y}] = c
+		}
+		y++
+	}
+
+	for i := 0; i < 50; i++ {
+		img = Enhance(img, enhancementString)
+	}
+	fmt.Println(img.CountBrightPixels())
 }