B10034043_曾日進_聖誕樹

background(40,215,10);

smooth();

for (int i = 40; i < 100; i = i+20) {

  line(30, i, 60, i);

}

for (int i = 40; i < 100; i = i+20) {

  line(30, i, 60, i-20);

}

for (int i = 40; i < 100; i = i+20) {

  line(90, i, 60, i);

}

for (int i = 40; i < 100; i = i+20) {

  line(60, i-20, 90, i);

}

line(60,80,60,100);