Texas Instruments TI-99/4A - Page 154

COLOR COMMANDS
SOUND COMMANDS
You may want to try using your computer's color
and sound capabilities with BASIC commands.
The TI-99/4A can use a variety of sound and
color commands that can add musical and visual
effects to your programs. You can see an exam
ple of the color commands available by trying
this simple program.
First type NEW and press the ENTER key to
clear the program that we just used from the
computer's memory
Now, type the following program (and don't
forget to press ENTER after you finishtyping
each line):
10FORX=1 TO 16
20 CALL CLEAR
30 PRINT "THE NUMBER IS"
40 PRINT X
50CALLSCREEN(X)
60FORY=1 TO 100
70 NEXT Y
80 NEXT X
Check your work to be sure there are no errors.
SCREEN 1
Now type the word RUN and press the ENTER
key What's the result?
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