//Wie ändere ich genau in diesem Beispiel die Gametime() und abhängig von der Rendertime()?

final int X = 30;
int S = 0;
PImage alien_pic;
PImage shooter_pic;

class Alien {
  float x, y;
  float vx, vy;
  int i;
  int down;

  Alien(float x_Pos, float y_Pos) {
    x = x_Pos;
    y = y_Pos;
    vx = 30;
    vy = 30;
    down = 0;
  }
  void move() {
    if (down==0) {
      x = x + 30;
    }
    if (x == width) {
      x = width;
      for (int i=0; i<=1; i++) {
        y = y + vy;
        down=1;
      }
    }
    if (down==1) {
      vy=0;
      x = x - 30;
    }
    if (down==1) {
      if (x==0) {
        x = 0;
        vy=X;
        for (int i=0; i<=1; i++) {
          y = y + vy;
          down=0;
        }
      }
    }
  }
  void display() {
    image(alien_pic, x, y);
    move();
  }
}
class Shooter {
  float x, y;

  Shooter(float x_Pos, float y_Pos) {
    x = x_Pos;
    y = y_Pos;
  }
  void display() {
    image(shooter_pic, x, y);
  }
}
class Bullet {
  float x, y;
  float w, h;
  float vy;

  Bullet(float x_Pos) {
    x = x_Pos;
    y = 19*X;
    w = 5;
    h = 15;
    vy = 20;
  }
  void move() {
    y = y - vy;
  }
  void display() {
    rect(x, y, w, h);
    move();
  }
}

Alien alien1 = new Alien(X, X);
Alien alien2 = new Alien(3*X, X);
Alien alien3 = new Alien(5*X, X);
Shooter shooter = new Shooter(8*X, 18*X);
Bullet bullet = new Bullet(shooter.x+12);

void setup() {
  size(17*X, 19*X);
  background(0);
  frameRate(5);
  alien_pic = loadImage("alien.jpg");
  shooter_pic = loadImage("shooter.jpg");
  //for-Schhleife zum Erstellen der 4 Reihen Aliens

}
void draw() {
  background(0);
  alien1.display();
  alien2.display();
  alien3.display();
  shooter.display();
  if (S >= 1) {
    bullet.display();
  }
}
void keyPressed() {
  if (key == ' ') {
    S = 1;
  }
  if (key == CODED){
    if (keyCode == LEFT) {
      if (shooter.x>=0+30){
        shooter.x = shooter.x - 30;
      }
    }
    if (keyCode == RIGHT) {
      if (shooter.x<=15*X){
        shooter.x = shooter.x + 30;
      }
    }
  }
}