diff --git a/13/main.go b/13/main.go
index 787d826..7c270fe 100644
--- a/13/main.go
+++ b/13/main.go
@@ -120,8 +120,8 @@ func partTwo() {
 		}
 	}
 	// print letters
-	for y := 0; y < 6; y++ {
-		for x := 0; x < 5*8; x++ {
+	for y := 0; y < 6; y++ { // six units tall
+		for x := 0; x < 5*8; x++ { // 5 units wide, 8 letters
 			if _, ok := points[point{x: x, y: y}]; ok {
 				fmt.Printf("#")
 			} else {