diff --git a/commands/drawDesign.cjs b/commands/drawDesign.cjs
index b6281ea..d01a4d3 100644
--- a/commands/drawDesign.cjs
+++ b/commands/drawDesign.cjs
@@ -178,7 +178,7 @@ function design4(input) {
 				// for vertical movement
 				for (j = 0; j <= 2 * radius; j++) {
 					dist = Math.sqrt(
-						((i - radius) * (i - radius) * 4) +
+						((i - radius) * (i - radius) * 4) + // (* 4) accounts for the offset between lines
 						(j - radius) * (j - radius)
 					);
 						//console.log(i, j, radius, dist);