亂數畫圓

gistfile1.java

int xx = 200;
void setup() {
  size(300, 300); //畫面尺寸
  background(255);//背景白色
}

void draw()
{
  background(255);
  fill(255, 0, 0); //畫圖填滿紅色  
  ellipse(xx, 200, 60, 50); //畫圓
  line(xx, 0, xx, height);
  line(0, 200, width, 200);
  xx = int(random(0, 200));
}