//Aufgabe 1
//Balloon Klasse
class Balloon{
  //Attribute
  float x,y;
  float w,h;
  //Konstruktor
  Balloon(float x, float y, float w, float h){
    this.x = x;
    this.y = y;
    this.w = w;
    this.h = h;
  }
  void move(float velocity){
    y+=velocity;
  }
  boolean visible(){
    //Ausserhalb vom oberen Rand
    if(y+h<0) return false;
    return true;
  }
  void display(){
    move(-3); //bewegt Ballon 3 pixeln nach oben
    ellipse(x+w/2,y+h/2,w,h);
  }
}
//Aufgabe 2: 20 ballons spawnen
Balloon[] balloons = new Balloon[20];
void setup(){
  size(400,300);
  //Ballons initiieren
  for (int i=0; i<balloons.length;i++)
    balloons[i]=new Balloon((int) random(0,width),height,10,15);
}
void draw(){
  background(0);
  for (int i=0; i<balloons.length;i++)
    balloons[i].display();
}