#include <Servo.h>// define a header file. Special attention here, you can call the servo function
//directly from Arduino's software menu
//bar Sketch>Importlibrary>Servo, or input #include <Servo.h>. Make sure there is a space   
//between #include and <Servo.h>. Otherwise, it will cause compile error.

Servo myservo; // define servo variable name
void setup()
{
myservo.attach(9); // select servo pin(9 or 10)
}
void loop()
{
myservo.write(90); // set rotate angle of the motor
delay(1000);
myservo.write(0);
delay(1000);
}
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