Help with servo setup

Hi.

Im doin a project where I want a servo to go from point A (115) to point B (163) and vice versa.

I have found code that seems to do the trick, but im not sure how to connect the button to the arduino.

01 #include <Servo.h>
02
03 // Set digital pin numbers:
04 const int servoPin = 8; // The number of the Servo pin
05 const int buttonPin = 9; // The number of the Pushbutton pin
06
07 int buttonState = 0; // Variable for reading the pushbutton status
08 int directionState = 0; // Variable for reading direction of the servo
09
10 Servo myservo; // Create servo object to control a servo
11
12 int pos = 0; // Variable to store the servo position
13
14
15 void setup() {
16 myservo.attach(8); // attaches the servo on pin 8 to the servo object
17 pinMode(buttonPin, INPUT); // initialize the pushbutton pin as an input
18 }
19
20 void loop(){
21 // read the state of the pushbutton value:
22 buttonState = digitalRead(buttonPin);
23
24 if (directionState == 0){
25 //The button is pushed
26 if (buttonState == HIGH) {
27 directionState = 1;// The direction for the servo is clockwise
28
29 // goes from 0 degrees to 180 degrees in steps of 1 degree
30 for(pos = 0; pos < 180; pos=pos+1)
31 {
32 myservo.write(pos); // tell servo to go to position in variable ‘pos’
33 delay(15); // waits 15ms for the servo to reach the position
34 }
35 }
36
37 } else if (directionState == 1) {
38 // The button is pushed
39 if (buttonState == HIGH) {
40 directionState = 0; // The direction for the servo is anti-clockwise
41
42 // goes from 180 degrees to 0 degrees in steps of 1 degree
43 for(pos = 180; pos>=1; pos=pos-1)
44 {
45 myservo.write(pos); // tell servo to go to position in variable ‘pos’
46 delay(15); // waits 15ms for the servo to reach the position
47 }
48 }
49 }
50 }

Thanks in advance