Servo SG90 and Arduino

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 #include <Servo.h>
Servo myservo; //initialize a servo object
int angle = 0;    
 
void setup() 
{ 
  myservo.attach(9); // connect the servo at pin9
} 
  
void loop() 
{ // move from 0 to 180 degrees with a positive angle of 1
  for(angle = 0; angle < 180; angle += 1) { myservo.write(angle); delay(15); } delay(1000); // move from 180 to 0 degrees with a negative angle of 5 for(angle = 180; angle>=1; angle-=5)
  {                                
    myservo.write(angle);
    delay(5);                       
  } 

    delay(1000);
}