diff --git a/main.go b/main.go
index 51bfd58..169ea8d 100644
--- a/main.go
+++ b/main.go
@@ -58,9 +58,9 @@ func main() {
 	w := rl.GetRenderWidth()
 	h := rl.GetRenderHeight()
 
-	angles := make([]float32, 1000)
+	angles := make([]float32, 2000)
 	noise := opensimplex.NewNormalized(0)
-	r := 0.75
+	r := 2.0
 	dtheta := 360.0/float64(len(angles))
 	for i := range len(angles) {
 		rad := float64(i) * dtheta * math.Pi / 180.0
@@ -70,12 +70,12 @@ func main() {
 	}
 
 	sketches := []Sketch{
-		&SierpinskiArrow{},
 		&Worm{
 			position: rl.Vector2 { X: 50, Y: 50 },
 			angles: angles,
 			angleIndex: 0,
-			stepSize: 2,
+			stepSize: 1,
+			renderPct: 0.1,
 		},
 	}
 
@@ -141,8 +141,6 @@ func main() {
 
 		rl.EndMode2D()
 
-		rl.DrawLine(10, 10, int32(w-10), int32(h-10), rl.Black)
-
 		// HUD
 		rl.DrawText("Mouse right button drag to move, mouse wheel to zoom", 10, 10, 20, rl.Black)
 		rl.EndDrawing()
@@ -189,12 +187,14 @@ type Worm struct {
 	angles []float32
 	angleIndex int
 	stepSize int
+	renderPct float32
 }
 
 func (w *Worm) Draw(ctx *RenderCtx) {
 	rl.PushMatrix()
 	rl.Translatef(w.position.X, w.position.Y, 0)
 	lastAngle := float32(0.0)
+	stepCount := 0
 	for i := range w.angles {
 		ii := (i + w.angleIndex) % len(w.angles)
 		angle := w.angles[ii]
@@ -202,6 +202,10 @@ func (w *Worm) Draw(ctx *RenderCtx) {
 		rl.DrawLine(0, 0, int32(w.stepSize), 0, rl.Black)
 		rl.Translatef(float32(w.stepSize), 0, 0)
 		lastAngle = angle
+		stepCount++
+		if stepCount > int(float32(len(w.angles))*w.renderPct) {
+			break
+		}
 	}
 	rl.PopMatrix()
 	w.angleIndex = (w.angleIndex + 1) % len(w.angles)