Work With 7-Color LEDs

1int neg =  13;    // +LED connected to digital pin 13
2int pos =  12;     // -LED connected to digital pin 12
3int crtl =  11;  // control coonected   to digital pin 11
4
5// The setup() method runs once, when the sketch starts
6
7void   setup()   {                
8  // initialize the digital pin as an output:
9   pinMode(neg, OUTPUT);
10  pinMode(pos, OUTPUT);
11  pinMode(crtl, OUTPUT);
12   digitalWrite(pos, HIGH);    // set the LED on
13  digitalWrite(neg, LOW);   //   set the LED off
14  digitalWrite(crtl,LOW);  //ser the crtl off
15  delay(15000);                   // wait for 15 second
16}
17// the loop() method runs over and   over again,
18// as long as the Arduino has power
19
20void loop()                     
21{
22digitalWrite(crtl,   HIGH);
23delay(250);
24digitalWrite(crtl, LOW);
25delay(250);
26
27  
28
29}
30