unsigned long myTime;
int casDelay=300,m=0;
int led=5;
int button=4;
int led2=6;
void setup() {
Serial.begin(115200);
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(button, INPUT_PULLUP);
myTime=millis();

}

void loop() {
if ((millis()-myTime)>casDelay){
  myTime=millis();
  m =! m;
  if (m){
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led,LOW);
  }
}
if (digitalRead(button)==LOW){
  digitalWrite(led2,HIGH);
}
else{
  digitalWrite(led2,LOW);
}
}