int RedledPin= 2;
int BlueledPin= 4;
int buttonPin= 8;


void setup() {  // meant for configuration and initialisation 
//put your setup code here, to run once:
pinMode(RedledPin, OUTPUT);
pinMode(BlueledPin, OUTPUT);

pinMode(buttonPin, INPUT);

}


void loop() {
  // put your main code here, to run repeatedly:
int buttonValue = digitalRead(buttonPin);
if(buttonValue == HIGH){

for(int i =0; i<4; i++)
{
digitalWrite(RedledPin, HIGH);
 delay(200);
 digitalWrite(RedledPin, LOW);
 delay(200);
 digitalWrite(BlueledPin, HIGH);
 delay(200);
 digitalWrite(BlueledPin, LOW);
 delay(200);

}

}

}