Stepper Kill Switch

Other Hardware Motors, Mechanics, Power and CNC
7

I wrote a code that i thought would work, but when i hit my kill switch the motor simply started making a higher pitched hum.
Here is the code could you please explain why it didn't work;

const int buttonPin = 1;
int dirPin = 8;
int stepPin = 9;

int Distance = 0;
int buttonState = 0;

void setup() {                

  pinMode(buttonPin, INPUT);
  pinMode(dirPin, OUTPUT);
  pinMode(stepPin, OUTPUT);
  digitalWrite(dirPin, LOW);
  digitalWrite(stepPin, LOW);
}

void loop() {
  
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(100);          
  digitalWrite(stepPin, LOW); 
  delayMicroseconds(100);

  Distance = Distance + 1;
  if (Distance == 5000)
  {
    if (digitalRead(dirPin) == LOW)
    {
      digitalWrite(dirPin, HIGH);
    }
    else
    { 
      digitalWrite(dirPin, LOW);
    }
    Distance = 0;
    delay(500);  
 }
    if (digitalRead(buttonPin) == HIGH) {          
      digitalWrite(stepPin, LOW); 
}
}

Moderator edit:
</mark> <mark>[code]</mark> <mark>

</mark> <mark>[/code]</mark> <mark>
tags added.