added changes suggested in the PR discussion.

README.md

@@ -39,8 +39,16 @@ void setup() {
 ## Plugin methods
 
 The plugin provides two objects: `LEDRainbowEffect`, and `LEDRainbowWaveEffect`,
-both of which provide methods to set the delay time (animation speed)
+both of which provide the following methods:
-and effect brightness, called `delay` and `brightness` respectively.
+
+### `.brightness(brightness)`
+
+Sets the LED brightness for the effect.
+
+### `.update_delay(delay)`
+
+Sets the number of miliseconds between effect updates.
+Smaller number = faster rainbows.
 
 ## Dependencies
 

src/Kaleidoscope-LEDEffect-Rainbow.cpp

@@ -23,7 +23,7 @@ void LEDRainbowEffect::brightness(byte brightness) {
   rainbow_value = brightness;
 }
 
-void LEDRainbowEffect::delay(byte delay) {
+void LEDRainbowEffect::update_delay(byte delay) {
   rainbow_update_delay = delay;
 }
 
@@ -56,7 +56,7 @@ void LEDRainbowWaveEffect::brightness(byte brightness) {
   rainbow_value = brightness;
 }
 
-void LEDRainbowWaveEffect::delay(byte delay) {
+void LEDRainbowWaveEffect::updat_delay(byte delay) {
   rainbow_update_delay = delay;
 }
 }

src/Kaleidoscope-LEDEffect-Rainbow.h

@@ -9,7 +9,7 @@ class LEDRainbowEffect : public LEDMode {
   LEDRainbowEffect(void) {}
 
   void brightness(byte);
-  void delay(byte);
+  void update_delay(byte);
   void update(void) final;
 
  private:
@@ -29,7 +29,7 @@ class LEDRainbowWaveEffect : public LEDMode {
   LEDRainbowWaveEffect(void) {}
 
   void brightness(byte);
-  void delay(byte);
+  void update_delay(byte);
   void update(void) final;
 
  private: