int r = 9;
int g = 10;
int b = 11;
void setup() {
pinMode(r, OUTPUT);
pinMode(g, OUTPUT);
pinMode(b, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
red();
delay(500);
green();
delay(500);
blue();
delay(500);
}

void red()
{
digitalWrite(r,1);
digitalWrite(g,0);
digitalWrite(b,0);
}

void green()
{
digitalWrite(r,0);
digitalWrite(g,1);
digitalWrite(b,0);
}
void blue()
{
digitalWrite(r,0);
digitalWrite(g,0);
digitalWrite(b,1);
}

void color(int rr,int gg,int bb,)
{
 analogWrite(r,rr);
 analogWrite(g,gg);
 analogWrite(b,bb);
}