task1

int ledpin =11;
int x;
int y;
int i;
int z;
bool ledstate = LOW;
unsigned long previousmillis = 0;
const long interval = 500;
unsigned long currentmillis;

void Blink(){
  ledstate=!ledstate;
     digitalWrite(ledpin, ledstate);

}


void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
 pinMode(ledpin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if (Serial.available()>0){
  x=Serial.read();
  if (x>=49){
  y=x-49;
  for (i=0; i>=y; i++){
    currentmillis = millis();
    z=currentmillis-previousmillis;
   if (z>=interval){
Blink();}
previousmillis=currentmillis;
}}}}