int l1 =7;
int l2 =6;
int l3 =5;
#include <Servo.h>
Servo myservo;
void setup()
{
myservo.attach(11);
 pinMode(l1, OUTPUT);
 pinMode(l2, OUTPUT);
 pinMode(l3, OUTPUT);


}
void loop()
{
  digitalWrite(l3,0);
digitalWrite(l1,1);

myservo.write(0); 
delay(1000);
digitalWrite(l1,0);
digitalWrite(l2,1);

myservo.write(90); 
delay(1000); 
digitalWrite(l2,0);
digitalWrite(l3,1);

myservo.write(180); 
delay(1000); 




}