程式
size 400 400
paper 100 0 0
pen 100
line 0 200 400 200
line 200 400 200 0
line 200 400 0 200
line 0 200 200 0
line 200 0 400 200
line 0 200 400 200
line 400 200 200 400
line 200 225 175 200
line 175 200 200 175
line 200 175 225 200
line 225 200 200 225
line 125 300 100 325
line 100 325 75 300
line 75 300 100 275
line 100 275 125 300
line 125 100 100 125
line 100 125 75 100
line 75 100 100 75
line 100 75 125 100
line 300 75 325 100
line 325 100 300 125
line 300 125 275 100
line 275 100 300 75
line 325 300 300 325
line 300 325 275 300
line 275 300 300 275
line 300 275 325 300
