#define led1 12
#define led2 11
#define led3 10
#define led4 9
#define potPin A5

int t = 50;
void setup() {
  pinMode(led1,OUTPUT);
  pinMode(led2,OUTPUT);
  pinMode(led3,OUTPUT);
  pinMode(led4,OUTPUT);
  
}

void loop() {
  t = map(analogRead(potPin),0,1023, 1, 1500);
  digitalWrite(led1,HIGH);
  digitalWrite(led3,HIGH);
  delay(t);
  digitalWrite(led1,LOW);
  digitalWrite(led3,LOW);
  delay(t);
  digitalWrite(led2,HIGH);
  digitalWrite(led4,HIGH);
  delay(t+150);
  digitalWrite(led2,LOW);
  digitalWrite(led4,LOW);
  delay(t+150);
}