int servo = 4;
int button = 2;
int angle;
int pwm;
int y=0;

void setup()
{
  pinMode(servo, OUTPUT);
  pinMode(button, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2),motor,FALLING);
  Serial.begin(9600);
}

void loop() 
{
  if(y==1){
    servoPulse(servo, angle*y+30);
    delay(1000*y);
    servoPulse(servo, (angle+60)*y+30);
   delay(100*y);
  }
  else { servoPulse(servo,angle);} 
  delay(50);
  if(digitalRead(button)==1){attachInterrupt(digitalPinToInterrupt(2),motor,FALLING);}
}

void motor()

{
  if(y==1){y=0; angle=30;}
  else {y=1;angle=70;}
  detachInterrupt(digitalPinToInterrupt(2));
  Serial.println(y);
}

void servoPulse (int servo, int angle)

{
  pwm = (angle*11)+500;
  digitalWrite(servo, HIGH);
  delayMicroseconds(pwm);
  digitalWrite(servo, LOW);
  delay(50);
}