//part 1

#define sw_1 1
#define adj_sw A0
#define max_del 500
int getdelay();

void setup() {
  // put your setup code here, to run once:
  pinMode(11,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(sw_1,INPUT);
  pinMode(adj_sw, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int val=getdelay();
  if(digitalRead(sw_1)==true){
    digitalWrite(11, HIGH);
    delay(val);
    digitalWrite(11, LOW);
    digitalWrite(10, HIGH);
    delay(val);
    digitalWrite(10, LOW);
    digitalWrite(9, HIGH);
    delay(val);
    digitalWrite(9, LOW);
    digitalWrite(8, HIGH);
    delay(val);
    digitalWrite(8, LOW);
  }
}

int getdelay(){
  double voltage=analogRead(adj_sw);
  return voltage/1023*max_del;
}