diff --git a/11.风扇.html b/11.风扇.html
index 1e0fc8f..4b0a98e 100644
--- a/11.风扇.html
+++ b/11.风扇.html
@@ -32,14 +32,14 @@
                 stroke("rgba(128,128,255,0.8)");
                 fill("rgba(128,128,255,0.8)");
                 beginShape();
-                for (let θ = 0; θ < 180; θ++) {
+                for (let θ = 0; θ < 360; θ+=3) {
                     let d = r * sin(θ * 3);
                     vertex(cos(θ) * d, -sin(θ) * d);
                 }
                 endShape(CLOSE);
                 speed = lerp(speed, speeds[gear], acceleration);
                 angle =
-                    (angle + anglePerFrame * (speed * random(0.95, 1.05))) %
+                    (angle + anglePerFrame * (speed * random(0.99, 1.01))) %
                     360;
                 pop();
             }