120

64

32

16

6

4

2

1

Cl

0

0

0

1

7

31

31

31

3,

31

31

31

26

30

15

3

0

0

0

 

0

0

0

 

0

0

3

15

31

31

31

31

31

31

26

26

31

7

1

0

0

0

0

126

64

32

16

6

4

2

1

0

0

15

127

255

255

255

255

255

255

240

126

255

127

0

 

126

240

255

31

1

 

0

0

3

31

255

255

255

255

255

255

252

224

240

255

15

0

192

254

127

7

0

0

126

64

32

16

6

4

2

1

63 255 255 255 255 255 254 240 224 0 0 0 192 240 252 15 7 7 199 247 127

127 255 255 255 255 255 252 240 192 0 0 0 224 240 126 7 7 135 231 255 63

Following is the BASIC program that prints the design shown on the previous pages. Notice that the data numbers in lines 80-140are the same numbers that you see in the last illustration. Also note that the WIDTH statement in line 10 is for IBM PC BASIC; the format may be different for your system.

4-20

Using Software and Graphics