diff --git a/README.md b/README.md
index 3434456..6ee5b19 100644
--- a/README.md
+++ b/README.md
@@ -41,15 +41,15 @@ int main(void)
     zh_avr_ac_dimmer_start();
     for (;;)
     {
-        for (uint8_t i = 0; i <= 100; ++i)
+        for (uint8_t i = 1; i <= 100; ++i)
         {
             zh_avr_ac_dimmer_set(i);
-            _delay_ms(100);
+            _delay_ms(50);
         }
-        for (uint8_t i = 100; i >= 0; --i)
+        for (uint8_t i = 100; i >= 1; --i)
         {
             zh_avr_ac_dimmer_set(i);
-            _delay_ms(100);
+            _delay_ms(50);
         }
     }
     return 0;