b10030038_王國豪_聖誕樹

size (800,400);
background(200,0,0) ;
ellipse (300,70,50,50)
;
for (int j=0; j<50;j=j+2) {
  line(300,j,250-j,j);
}
for (int i =0; i<50;i=i+2) {
  line(300,i,350+i,i);
}
for (int i =50; i<100;i=i+2) {
  line(300-i, i, 300+i,i);
}
for (int i =100; i<250;i=i+2) {
  line(200-i, i,350+i,i);
}

rect(280,250,55,55)
;