float x;
float y;
float velocidad = 2.5;

void setup(){
  size(240,220);
}
void draw(){
    y += random(-velocidad, velocidad);
  x += random(-velocidad, velocidad);
 
  ellipse(x+50,y+50,30,30);
}

______________________________________________________________________________

void setup(){

  size(240,320);

}

void draw(){

  //for= variable, comparacion y sumatoria

  for (int x=20; x < width; x +=20){

    line(x,20,x,100);

  }

_______________________________________________________________________________

void setup(){

  size(240,320);

}

void draw(){

  background(125);

  //for= variable, comparacion y sumatoria

  for (int x=20; x < width; x +=20){

    float mx = mouseX / 10;

    println(mx);

    float aleatorio = random(-mx,mx);

    line(x+aleatorio,20,x,100);

  }

}