int red=6;
int green=5;
int blue=4;
void setup() {
  pinMode(6,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(4,OUTPUT);
  

}

void loop() {
  
 analogWrite(6, 0);
 analogWrite(5, 255);
 analogWrite(4, 255);
 delay(1000);

 analogWrite(6, 255);
 analogWrite(5, 0);
 analogWrite(4, 255);
delay(1000);

 analogWrite(6, 255);
 analogWrite(5, 255);
 analogWrite(4, 0);
 delay(1000);
 
}