This is what I currently have, im just not sure about how I should go about making the lights blink since I only have 1 pushbutton int ledPinSingle= 9;
int ledPinFlash1= 10;
int ledPinFlash2= 11;
int ButtonPin =2;

void setup(){
pinMode(ledPinSingle, OUTPUT);
pinMode(ledPinFlash1, OUTPUT);
pinMode(ledPinFlash1, OUTPUT);
pinMode(ButtonPin, INPUT);
Serial. begin(9600);

}

void loop(){
if(digitalRead(ButtonPin)==HIGH)
{
digitalWrite(ledPinSingle, HIGH);
Serial. print("Single LED on");
}
else if (digitalRead(ButtonPin) == LOW){
digitalWrite(ledPinSingle, LOW);
digitalWrite(ledPinFlash1,HIGH);
digitalWrite(ledPinFlash2,LOW);
Serial. print("Flashing back and forth");
delay(50);

}

}