int PButton = 7;
int LEDr = 13;
int LEDg = 12;
int LEDb = 11;
int LEDy = 10 ;
int num=0;

void setup() {
  // put your setup code here, to run once:
pinMode(PButton, INPUT);
pinMode(LEDr, OUTPUT);
pinMode(LEDg, OUTPUT);
pinMode(LEDb, OUTPUT);
pinMode(LEDy, OUTPUT);
digitalWrite(LEDr, LOW);
digitalWrite(LEDg, LOW);
digitalWrite(LEDb, LOW);
digitalWrite(LEDy, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
while (digitalRead(PButton)) {
digitalWrite(LEDr, HIGH);
delay(100);
digitalWrite(LEDr, LOW);
delay(50);
digitalWrite(LEDg, HIGH);
delay(100);
digitalWrite(LEDg, LOW);
delay(50);
digitalWrite(LEDb, HIGH);
delay(100);
digitalWrite(LEDb, LOW);
delay(50);
digitalWrite(LEDy, HIGH);
delay(100);
digitalWrite(LEDy, LOW);
delay(50);
}
digitalWrite(LEDr, HIGH);
delay(500);
digitalWrite(LEDr, LOW);
delay(500);
}