#include <Servo.h>
Servo s1;

void setup() {
// put your setup code here, to run once:
s1.attach(11);
}

void loop() {
// put your main code here, to run repeatedly:
//s1.write(0);
//delay(1000);
//s1.write(90);
//delay(1000);
//s1.write(180);
//delay(1000);
for(int i=0; i<=180; i++)
{
s1.write(i);
delay(15);
}
for(int i=180; i>=0; i--)
{
s1.write(i);
delay(15);
}
}