//Background decoration class
class Grass{
  float [] x, y;
  Grass(float xpos){
    x = new float[4];
    y = new float[4];
    float theta = HALF_PI + PI;
    float ypos = height + 5;
    for(int i = 0; i < x.length; i++){
      theta += random(-angleStep, angleStep);
      x[i] = xpos;
      y[i] = ypos;
      xpos += cos(theta) * random(20, 40);
      ypos += sin(theta) * random(20, 40);
    }
  }
  void draw(){
    for(int i = 1; i < x.length; i++){
      strokeWeight(6 - (i * 1.5));
      stroke(0, 150, 0);
      line(x[i - 1], y[i - 1], x[i], y[i]);
      strokeWeight(1);
      if(i != 1){
        fill(20, 200, 0);
        stroke(0, 150, 0);
        ellipse(x[i - 1], y[i - 1], 16 - (i<<2), 16 - (i<<2));
      }
    }
  }
}