#include <Servo.h>
servo servomotor
int setup 
void setup() >{
  servomotor.attach(9)
  
  //put your setup code here,to run once;

]}

void loop (){
  //put your mail code here,to run once;
  for (angle=<100; angle++)
  servomotor,write(angle);
  delay(1000); 
  
  
  
  
  for (angle<=100; angle >=0; angle--)(10servomotor
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}