User`s manual

To see how more than one line combines to form a figure, enter and

run the following program, which uses the lines you have already

typed and adds several more.

5 PRINT CHR$(4);"PR#l"

10 PRINT CHR$(9);"Z"

20 PRINT CHR$(27);"A";CHR$(7)

FOR R=l TO

PRINT CHR$(27);"K";CHR$(l00);

CHR$(0);

50 FOR X=1 TO

50:

PRINT CHR$(85); CHR$(42);

60 NEXT X: PRINT

70 PRINT CHR$(27);"K";CHR$(l00); CHR$(0)

80 FOR X=1 TO 50: PRINT CHR$(42); CHR$ (85);

90 NEXT X: PRINT: NEXT R

100 PRINT CHR$(27);"@"

300

PRINT CHR$(4);"PR#0"

Now run the program to see the six print lines combine into a pat-

tern:

Because the short and simple program that produced the pattern

demonstrates many elements of graphics programming, each line is

explained below.

Line 20 changes the line spacing to 7/72 of an inch, which is the

height of the dot patterns used in the program. Therefore, there is no

space between the print lines.

Line 30 begins a loop to produce multiple print lines. Lines 40 and

50 were explained previously. Lines 70 and 80 are similar to lines 40

and 50 except that line 80 uses a reversal of the patterns in line 50. As