diff --git a/layouts/flow.go b/layouts/flow.go
index f083673..2420d0f 100644
--- a/layouts/flow.go
+++ b/layouts/flow.go
@@ -45,13 +45,14 @@ func (flow Flow) Arrange (hints tomo.LayoutHints, boxes tomo.BoxArranger) {
 	index := 0
 	for index < boxes.Len() {
 		// get a slice of boxes for this major step
-		stepIndexEnd := index + minorSteps
+		stepIndexStart := index
+		stepIndexEnd   := index + minorSteps
 		if stepIndexEnd > boxes.Len() { stepIndexEnd = boxes.Len() }
 		index += minorSteps
 		
 		// find a major size that will fit all boxes on this major step
 		majorSize := 0
-		for index := index; index < stepIndexEnd; index ++ {
+		for index := stepIndexStart; index < stepIndexEnd; index ++ {
 			boxSize := flow.major(boxes.MinimumSize(index))
 			if boxSize > majorSize { majorSize = boxSize }
 		}
@@ -61,7 +62,7 @@ func (flow Flow) Arrange (hints tomo.LayoutHints, boxes tomo.BoxArranger) {
 		var size image.Point
 		size = flow.incrMajor(size, majorSize)
 		size = flow.incrMinor(size, minorSize)
-		for index := index; index < stepIndexEnd; index ++ {
+		for index := stepIndexStart; index < stepIndexEnd; index ++ {
 			bounds := image.Rectangle { Min: point, Max: point.Add(size) }
 			boxes.SetBounds(index, bounds)