I use 3 pods to control 3 LEDs.

One pod controls brightness

another pod controls blink frequency

the other pod selects LED ==> the most important one!!

By controling the pod's value, one of the three LEDs will be turned on. When this LED-selecting pod has the greatest value (1023), the three LED will light up in turn.

When the LED-selecting pod has the greatest value (1023), and when the blink frequency-controlling pod has the smallest value (0), the three LED go crazy!!!

My Video:

http://www.youtube.com/v/hef5Worxx0U

My Code:

=== 

/*Aithne Sheng-Ying Pao's HW3
 * pot1Pin controls brightness, pot2Pin controls the blinking frequency, pot3Pin selects one of the three lights or make them on in turn.
 * modification of the following
 * http://www.arduino.cc/en/Tutorial/AnalogInput
 */
int pot1Pin = 0;   // select the input pin for the potentiometer 1
int pot2Pin = 1;   // select the input pin for the potentiometer 2
int pot3Pin = 2;   // select the input pin for the potentiometer 3

int pot1Val = 0;   // variable to store the value coming from pot 1
int pot2Val = 0;   // variable to store the value coming from pot 2
int pot3Val = 0;   // variable to store the value coming from pot 3

int ledPin = 11;   // select the initial output pin to 11

void setup() {
   pinMode(ledPin, OUTPUT);  // declare the led1Pin as an OUTPUT
}
void loop() {
   pot1Val = analogRead(pot1Pin);   // read the value from pot 1, between 0 - 1023, for dimming
   pot2Val = analogRead(pot2Pin);   // read the value from pot 2, between 0 - 1023, for blinking
   pot3Val = analogRead(pot3Pin);   // read the value from pot 2, between 0 - 1023, for selecting output pin
  
   //select one of the three pins(lights) by different pot3Val
   if (pot3Val<324){
     ledPin = 9;
     }
   else if (pot3Val<685){
     ledPin = 10;
     }
   else if (pot3Val <1023){
     ledPin = 11;
     }
   //select all three pins, and make the three LED will light in turn by the following for loop.
   else if (pot3Val == 1023) {
     for (ledPin=9; ledPin < 12; ledPin++ ){
         analogWrite(ledPin, pot1Val/4); // dim LED to value from pot1
         delay(pot2Val);                  // stop the program for some time, meaning, LED is on for this time
         analogWrite(ledPin, 0);         // dim LED to completely dark (zero)
         delay(pot2Val);                  // stop the program for some time, meaning, LED is OFF for this time
         if (ledPin==12){
           ledPin=9;
         }
      }
    }
   analogWrite(ledPin, pot1Val/4); // dim LED to value from pot1
   delay(pot2Val);                  // stop the program for some time, meaning, LED is on for this time
   analogWrite(ledPin, 0);         // dim LED to completely dark (zero)
   delay(pot2Val);                  // stop the program for some time, meaning, LED is OFF for this time
   }