一片叶子

import java.applet.*;
import java.awt.*;
public class LeafApplet extends java.applet.Applet {
public void init() {
}
public void paint(Graphics g){
int i;
double x=0,y=0,r,u=0;
for(i=0;i<=200000;i++) {
r = (int)(Math.random()*100);
if (r < 1){
x = 0;
y = .16 * y;
}
if (r>=1 && r<86){
u = .85 * x + .04 * y;
y = -0.04*x + 0.85 * y + 1.6;
x = u;
}
if (r>=86 && r<97){
u = .2 * x - .26 * y;
y = .23 * x + .22 * y + 1.6;
x = u;
}
if (r>=97){
u = -.15 * x + .28 * y;
y = 0.26 * x + .24 * y +.44;
x = u;
}
g.setColor(new Color(0,230,80));
g.drawLine((int)(40*x+120),(int)(420-40*y),(int)(40*x+120),(int)(420-40*y));
}
}
}