int numLines;
float radius;
int stro;
Lines[] ln;

void setup(){
  size(500, 500);
  background(0);
  stroke(255);
  smooth();
  
  //the equation below will make the lines extend to the edges
  radius = width/2-10; //sqrt(pow(width/2, 2)+pow(height/2,2)); 
  numLines = round(degrees(TWO_PI)/3);
  ln = new Lines[numLines];
  
  for (int i = 0; i<ln.length; i++){
    float angle = radians(i*3);
    float x = width/2 +(cos(angle) * radius);     //equation for the circle
    float y = width/2 +(sin(angle) * radius);     //that defines the lines.
    ln[i] = new Lines(x, y, ln);
  }

}

void draw(){
  fill(0, 12);
  rect(-1, -1, width+1, height +1);
  fill(255);
  stroke(255);
  for (int i = 0; i <ln.length; i++){
    ln[i].update();
    ln[i].display();

  }
}

class Lines{
  float x, y, m;
  Lines[] others;
  boolean over;
  boolean locked = false;
  boolean otherslocked = false;

  Lines(float xpos, float ypos, Lines[] o){
    x = xpos;
    y = ypos;
    m = y/x;
    others = o;

  }

  void update(){
    for (int i = 0; i<others.length; i++){
	if (others[i].locked == true){
	  otherslocked = true;
	  break;
	} 
	else {
	  otherslocked = false;
	}
    }

    if (otherslocked == false){
	over();
    }
  }

  void over(){
    if (overLine(x, y, m)){
	over = true;
	stro = 3;
    }
    else{
	over = false;
	stro = 1;
    }
  }

  void display(){
    
    if (over) {
	strokeWeight(stro);
	line(x, y, width/2, height/2);
    }

    strokeWeight(1);
    line(x, y, width/2, height/2);
  }
}

boolean overLine(float x, float y, float m){
  if (mouseX >= y/m && mouseY >= m*x){   //if I change the '>' for '<' I can change 
    return true;				 //which quadrant it will respond to the 
  }						  //mouse properly in
  else {
    return false;
  }
}