#define motor 3
int i = 0;
void setup() {
  pinMode(motor,OUTPUT);
 
}
void loop() {
  if(i == 0){
    for(i = 0; i <= 255;i++){
      delay(10);
      analogWrite(motor,i);
    }
  }
  while(i == 255){
    analogWrite(motor,255);
  }
}