jluserov_generativedesign/libro09_lineaconvariacionesdeysumandoyrestando/libro09_lineaconvariacionesdeysumandoyrestando.pde
float xstep = 10;
float ystep = 10;
float lastx = 20;
float lasty = 50;
float y = 50;
for (int x=20; x<=480; x+=xstep) {
  ystep = random(20) - 10; //range -10 to 10
  y += ystep;
  line(x, y, lastx, lasty);
  lastx = x;
  lasty = y;
}
