E7

void setup() {

  size(200, 300);

  smooth();

  background(250, 250, 180);

}

​

void draw() {

​

  stroke(60, 0, 140);

  strokeWeight(1);

  line(0, 30, width, 30);

  line(0, 40, width, 40);

  line(0, 50, width, 50);

  line(0, 60, width, 60);

  line(0, 70, width, 70);

  line(0, 80, width, 80);

  line(0, 90, width, 90);

  line(0, 100, width, 100);

  line(0, 110, width, 110);

  line(0, 120, width, 120);

  line(0, 130, width, 130);

  line(0, 140, width, 140);

  line(0, 150, width, 150);

  line(0, 160, width, 160);

  line(0, 170, width, 170);

  line(0, 180, width, 180);

  line(0, 190, width, 190);

  line(0, 200, width, 200);

  line(0, 210, width, 210);

  line(0, 220, width, 220);

  line(0, 230, width, 230);

  line(0, 240, width, 240);

  line(0, 250, width, 250);

  line(0, 260, width, 260);

  line(0, 270, width, 270);

  line(0, 280, width, 280);

  line(30, 0, 30, height);

  line(180, 0, 180, height);

  fill(0);

  ellipse(15, 70, 10, 10);

  ellipse(15, 120, 10, 10);

  ellipse(15, 170, 10, 10);

  ellipse(15, 220, 10, 10);

​

​

  stroke(0, 30, 140);

  strokeWeight(2);

  if (mousePressed) {

    line(mouseX, mouseY, pmouseX, pmouseY);

  }

  if (mousePressed && mouseButton==RIGHT) {

  fill(250, 250, 180);

  rect(0, 0, width, 300);

  }

}