diff --git a/Example/Example/Assets.xcassets/ProHUDLoading.imageset/Contents.json b/Example/Example/Assets.xcassets/ProHUDLoading.imageset/Contents.json
new file mode 100644
index 0000000..61d30f6
--- /dev/null
+++ b/Example/Example/Assets.xcassets/ProHUDLoading.imageset/Contents.json
@@ -0,0 +1,22 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "矩形@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "矩形@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/Example/Example/Assets.xcassets/ProHUDLoading.imageset/矩形@2x.png b/Example/Example/Assets.xcassets/ProHUDLoading.imageset/矩形@2x.png
new file mode 100644
index 0000000..a9890d7
Binary files /dev/null and b/Example/Example/Assets.xcassets/ProHUDLoading.imageset/矩形@2x.png differ
diff --git a/Example/Example/Assets.xcassets/ProHUDLoading.imageset/矩形@3x.png b/Example/Example/Assets.xcassets/ProHUDLoading.imageset/矩形@3x.png
new file mode 100644
index 0000000..8fed210
Binary files /dev/null and b/Example/Example/Assets.xcassets/ProHUDLoading.imageset/矩形@3x.png differ
diff --git a/Example/Example/TestAlertVC.swift b/Example/Example/TestAlertVC.swift
index 1807fbf..dc7d492 100644
--- a/Example/Example/TestAlertVC.swift
+++ b/Example/Example/TestAlertVC.swift
@@ -138,7 +138,7 @@ class TestAlertVC: BaseListVC {
                             vm.scene = .loading
                             vm.title = "正在加载"
                         }
-                        a.rotate(direction: .counterclockwise)
+                        a.rotate()
                     }
                 }
             }
diff --git a/Source/HUDView.swift b/Source/HUDView.swift
index 3b0320b..80548b7 100644
--- a/Source/HUDView.swift
+++ b/Source/HUDView.swift
@@ -156,7 +156,7 @@ internal extension UIView {
                 let ani = CABasicAnimation(keyPath: "transform.rotation.z")
                 ani.toValue = direction.rawValue * Double.pi * 2.0
                 if speed > 0 {
-                    ani.duration = 4 / speed
+                    ani.duration = 2 / speed
                 }
                 ani.repeatDuration = .infinity
                 layer.add(ani, forKey: "rotationAnimation")