skyline

void setup() {
  size(800, 1200);
  background(122);
  stroke(0);
  fill(255);
  strokeWeight(4);
  strokeJoin(ROUND);

  for (int i=0; i<50; i++) {
    fill(255);
    float x = random(width);
    float y = height;
    float x2 = x;
    float y2 = random(height/7, height);
    float x3 = x2 + random(20, 100);
    float y3 = y2 - random(20, 100);
    float x4 = x3;
    float y4 = y;
    quad(x, y, x2, y2, x3, y3, x4, y4);
    fill(200);
    x = x4;
    y = y4;
    x2 = x3;
    y2 = y3;
    x3 = x2 + random(20, 60);
    y3 = y2 + random(20, 60);
    x4 = x3;
    y4 = height;
    quad(x, y, x2, y2, x3, y3, x4, y4);
  }
}

void draw() {
}

void mouseClicked() {
  setup();
}

void keyPressed() {
  save(random(12345)+".png");
}