I am making a rubber band gun but i cant seem to get the button to work with my code to turn the servo?
Just put your button between pin3 and GND, and use the internal pullup resistor like this:

#include &lt;Servo.h&gt;
const int buttonPin = 3;
int buttonState = 0;

Servo myservo;   
void setup()
{
    myservo.attach(2);    
    pinMode(buttonPin, INPUT_PULLUP);
}

void loop()
{
    buttonState = digitalRead(buttonPin);
    if(buttonState == LOW)
    {
      myservo.write(90);
    }
    else
    {
      myservo.write(155);
    }   
    delay(1000); 
}