Spin the pointer

My project this week is literally a finger pointer. It is flat and moves 360 degrees and points to a location randomly. Ideally there would be people around in a circle and when I click the reset button it will turn and point randomly to one person.

I made it more appealing by accelerating the rotation from rest to a high speed and made it random by varying the acceleration randomly by changing the delay value.

Here’s a video of it working:

I’ve also attached the code I used:

const int motorPin = 9;


void setup()
{
    pinMode(motorPin, OUTPUT);
  Serial.begin(9600);
  motorAcceleration();
}


void loop()
{
 
}


void motorAcceleration()
{
  int speed;
  int delayTime = random(5,25); 

  for(speed = 0; speed <= 255; speed++)
  {
    analogWrite(motorPin,speed);    
    delay(delayTime);              
  }


  for(speed = 255; speed >= 0; speed--)
  {
    analogWrite(motorPin,speed);    // set the new speed
    delay(delayTime);               // delay between speed steps
  }
  delay(1000);
}