int timer =500;
int high = 200;
int low = 0;
void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  // for (int i=1; i<=5; i++){
  //   analogWrite(2,high);
  //   delay(timer);
  //   analogWrite(3,high);
  //   delay(timer);
  //   analogWrite(4,high);
  //   delay(timer);
  //   analogWrite(5,high);
  //   delay(timer);
  //   analogWrite(6,high);
  //   delay(timer);
  //   analogWrite(7,high);
  //   delay(timer);

  //   analogWrite(2,low);
  //   delay(timer);
  //   analogWrite(3,low);
  //   delay(timer);
  //   analogWrite(4,low);
  //   delay(timer);
  //   analogWrite(5,low);
  //   delay(timer);
  //   analogWrite(6,low);
  //   delay(timer);
  //   analogWrite(7,low);
  //   delay(timer);
  // }
int i=1;
  while(i<=2){
  analogWrite(2,high);
  delay(timer);
  analogWrite(2,low);
  delay(timer);
  i++; 
  }
int x=1;
  while(x<=2){
  analogWrite(3,high);
  delay(timer);
  analogWrite(3,low);
  delay(timer); 
  x++;
  }
int h=1;
  while(h<=2){
  analogWrite(4,high);
  delay(timer);
  analogWrite(4,low);
  delay(timer);
  h++;
  }
  int j=1;
  while(j<=2){
  analogWrite(5,high);
  delay(timer);
  analogWrite(5,low);
  delay(timer); 
  j++;
  }
int k=1;
  while(k<=2){
  analogWrite(6,high);
  delay(timer);
  analogWrite(6,low);
  delay(timer); 
  k++;
  }
int m=1;
  while(m<=2){
  analogWrite(7,high);
  delay(timer);
  analogWrite(7,low);
  delay(timer); 
  m++;
  }
}