int ledR = 13;
int ledG = 12;
int button = 7;
int blink;
void setup() {
// put your setup code here, to run once:
pinMode(ledG, OUTPUT);
pinMode(ledR, OUTPUT);
pinMode(button, INPUT);
}
void loop() {
// put your main code here, to run repeatedly:
blink = (digitalRead(button) == HIGH) ? ledG : ledR;
digitalWrite(blink, HIGH);
delay(500);
digitalWrite(blink, LOW);
delay(500);
}