PImage img;
color[] imageColors;

MyCircle c;
int i;

void setup()
{
  size(500,500);

  //read color palette from a color image. check the image out to see how it is being read!
  img = loadImage("colpalette-A.jpg");
  imageColors = new color[10];
  for(int x = 0; x < 10; x+=1){
    imageColors[x] = img.get(x*10+1,5);
  }

  PVector center = new PVector(250,250,0);
  c = new MyCircle(center, 15.5);
}


void draw()
{
  //the expression "abs(pmouseX-mouseX) + abs(pmouseY-mouseY)" is correlated with the speed of the mouse. pmouse-> prev mouse point 
  float deltaMouse = abs(pmouseX-mouseX) + abs(pmouseY-mouseY);

  c.Move(mouseX, mouseY);

  //frameCount%10 is a number between 0 and 10. '%' is the modulo (or remainder) operator. check reference.
  c.ChangeColor(imageColors[frameCount%10]);

  //use the speed of the mouse to affect the size and opacity of the circle.
  c.Grow(deltaMouse);
  c.Draw(deltaMouse);  
}