color circleColor;
color circleBGColor;

int test = 0;
float test2 = 0;

int numOfCircles = 50;
int stageWidth = 300;
int stageHeight = 300;
int circleWidth = 40;
int circleBorderWidth = 50;
int newPosRadius = 40;
int minXPos = circleWidth + 10;
int maxXPos = stageWidth - minXPos;
int minYPos = circleWidth + 10;
int maxYPos = stageHeight - minYPos;


int frame = 0;

Circle[] circles = new Circle[numOfCircles];

void setup() {
  size(stageWidth, stageHeight);
  colorMode(RGB, 100);
  circleColor = color(100, 50, 0);
  circleBGColor = color(100, 100, 100);
  smooth();
  background(20);
  framerate(30);
  
  for (int i = 0; i < numOfCircles; i++) {
    circles[i] = new Circle(int(random(minXPos, maxXPos)), int(random(minYPos, maxYPos)));
  }
}

void draw() { 
  background(20);
  
  for (int i = 0; i < numOfCircles; i++) {
    circles[i].moveTowardsTarget();
    circles[i].drawMyBorder();
  }
  
  for (int i = 0; i < numOfCircles; i++) {  
    circles[i].drawMe();
  }
  
  
}




class Circle {
  int xPos, yPos;
  int targetX, targetY;
  
  Circle(int x, int y) {
    xPos = x;
    yPos = y;
    setNewTarget();
  }
  
  void drawMe() {
    fill(circleColor);
    noStroke();
    ellipse(xPos, yPos, circleWidth, circleWidth);
  }
  
  void drawMyBorder() {
    fill(circleBGColor);
    noStroke();
    ellipse(xPos, yPos, circleBorderWidth, circleBorderWidth);
  }
  
  void setNewTarget() {
    float alpha = random(TWO_PI);
    if (aroundMouse(xPos, yPos, circleWidth)) {
	test2 = abs(atan2(mouseX - xPos, mouseY - yPos));
	if (test2 > TWO_PI) println("WHOAAAAAA");
	println("yea" + test2);
    }
    targetX = xPos + int(newPosRadius * cos(alpha));
    targetY = yPos + int(newPosRadius * sin(alpha));
    
    if (!inBounds(targetX, targetY)) 
	setNewTarget();
    //if (mousePressed && aroundMouse(targetX, targetY, circleWidth)) 
    //  setNewTarget();
  }
  
  void moveTowardsTarget() {
    
    if (diff(xPos, targetX) <= 7 && diff(yPos, targetY) <= 7)
	setNewTarget();
    
    xPos = xPos - int((xPos - targetX) / 8);
    yPos = yPos - int((yPos - targetY) / 8);
  }
}


int diff(int a, int b) {
  return(abs(a - b));
}

boolean inBounds(int x, int y) {
  if (x >= minXPos && x <= maxXPos && y >= minYPos && y <= maxXPos) {
    return true;
  } else {
    return false;
  }
}

boolean aroundMouse(int x, int y, int radius) {
  if (q(diff(x, mouseX)) + q(diff(y, mouseY)) < q(radius)) {
    return true;
  } else {
    return false;
  }
}

int q(int a) {
  return a*a;
}