//in class exercise

Stripe[] stripes = new Stripe [10];

void setup(){
  size(800,500);
  //initialize all "stripes"
  for (int j=0; j< stripes.length; j++){
    stripes[j] = new Stripe();
  }
}

void draw(){
  background(100);
  //move and display all stripes
  for(int j=0; j< stripes.length; j++){
    //check if mouse is over the Stripe
    stripes[j].rollover(mouseX, mouseY);
    stripes[j].move();
    stripes[j].display();
  }
}

class Stripe{
  float x;
  float speed;
  float w;
  boolean mouse;
  
  Stripe(){
    x=0;
    speed = random (1);
    w= random(10, 30);
    mouse = false;
  }
  
  //draw stripe
  void display(){
    if (mouse){
      fill(255);
    }else{
      fill(255,100);
    }
    noStroke();
    rect(x,0,w,height);
  }
  
  //move stripe
  void move(){
    x+= speed;
    if (x>width + 20) x = -20;
  }
  
  //check if point is inside of stripe
  void rollover(int mx, int my){
    //left edge is x, right edge is x+w
    if ( mx> x && mx < x+ w){
      mouse = true;
    }else{
      mouse = false;
    }
  }
}