const int red=7;
const int blue=3;
const int green=5;
// i used const so the value of the variable woudn't change throw the program//
void setup()
{ 
 pinMode(red, OUTPUT);
 pinMode(green, OUTPUT);
 pinMode(blue, OUTPUT);
}
void loop() 
{
  delay(1000);
  digitalWrite(red, LOW);
  digitalWrite(green, LOW); //blue//
  digitalWrite(blue, HIGH);
  delay(1000);
  // the key is playing with diffrent high and low each time to get multiple colors//
  digitalWrite(red, HIGH );
  digitalWrite(green, LOW); //red//
  digitalWrite(blue, LOW);
  delay(1000);

  digitalWrite(red, LOW);
  digitalWrite(green, HIGH); //green//
  digitalWrite(blue, LOW);
  delay(1000);

  digitalWrite(red, LOW);
  digitalWrite(green, HIGH); //cyan//
  digitalWrite(blue, HIGH);
  delay(1000);
  digitalWrite(red, HIGH);
  digitalWrite(green,LOW); //cyan//
  digitalWrite(blue, HIGH);
  delay(1000);
  digitalWrite(red,HIGH );
  digitalWrite(green,HIGH); //cyan//
  digitalWrite(blue,LOW);
  delay(1000);
  
}