作業三-黑暗能量

load dbngraphics.dbn
paper 20
size 300 300
fast
pen 0 0 100triangle 150 200 108 123 192 123pen 0 100 0triangle 150 250 108 123 192 123pen 100 0 0triangle 150 300 108 123 192 123pen 0 0 100rectangle 25 25 275 275pen 0 100 0rectangle 50 50 250 250pen 0 0 100rectangle 75 75 225 225pen 100 0 0rectangle 100 100 200 200pen 0 60 0rectangle 125 125 175 175



repeat A 0 100{circle 0 10 (A/2+5) 90
}
repeat A 0 100{circle 300 290 (A/2+5) 90
}
repeat A 0 100{circle 300 10 (A/2+5) 90
}
repeat A 0 100{circle 10 300 (A/2+5) 90
}