diff --git a/main.go b/main.go
index cddb9fd..ddbc631 100644
--- a/main.go
+++ b/main.go
@@ -21,8 +21,8 @@ func main() {
 	var sourceWidth int32 = 8000
 	var sourceHeight int32 = 6400
 
-	var targetWidth int32 = int32(2000)
-	var targetHeight int32 = int32(1200)
+	var targetWidth int32 = int32(1600)
+	var targetHeight int32 = int32(1000)
 
 	os.MkdirAll(snapshotsDir, 0755)
 	log := log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
@@ -60,16 +60,16 @@ func main() {
 
 	sierpinskiLayer := &SierpinskiArrow { dirty: true }
 
-	aurora := NewImageLayer("/home/d/Dropbox/photos/Events/2025/Aurora/Photo Nov 11 2025, 9 52 03 PM.jpg")
-	cave := NewImageLayer("/home/d/Dropbox/photos/Events/2025/ Chelsea and James visit Lindell/Photo Nov 29 2025, 5 26 40 PM (29).jpg")
 
-	sketch.AddColorLayer("background-black", rl.Black)
-	//sketch.AddColorLayer("background-magenta", rl.Magenta)
-	sketch.AddLayer("field", &FieldLayer{field: field, loColor: rl.NewColor(0, 0, 0, 0), hiColor: rl.Magenta, dirty: true})
+	//sketch.AddColorLayer("background-black", rl.Black)
+	sketch.AddColorLayer("background-magenta", rl.Magenta)
+	sketch.AddLayer("field", &FieldLayer{field: field, loColor: rl.NewColor(0, 0, 0, 0), hiColor: rl.Orange, dirty: true})
 	contourLayer := NewContourLayer(&sketch, rng, field)
 	sketch.AddLayer("contours", contourLayer)
 	sketch.AddLayer("sierpinski-arrowhead", sierpinskiLayer)
-	sketch.AddLayer("aurora", aurora)
+	//aurora := NewImageLayer("/home/d/Dropbox/photos/Events/2025/Aurora/Photo Nov 11 2025, 9 52 03 PM.jpg")
+	//sketch.AddLayer("aurora", aurora)
+	cave := NewImageLayer("/home/d/Dropbox/photos/Events/2025/ Chelsea and James visit Lindell/Photo Nov 29 2025, 5 26 40 PM (29).jpg")
 	sketch.AddLayer("cave", cave)
 
 	ports := MakePorts()
diff --git a/sketch.go b/sketch.go
index d2a1174..a2dd3d2 100644
--- a/sketch.go
+++ b/sketch.go
@@ -282,7 +282,7 @@ func (cl *ColorLayer) Update(ctx *RenderCtx) {
 }
 
 func (cl *ColorLayer) Draw(ctx *RenderCtx) {
-	rl.DrawRectangle(0, 0, ctx.SourceWidth, ctx.SourceHeight, cl.color)
+	rl.ClearBackground(cl.color)
 	cl.dirty = false
 }