Commodore Plus 4 - Page 96

IMPORTANT TO NOTE: Each time SHIFT or O is
referred to, it should be typed at the SAME TIME as the key
following it when entering the program.
10 PRINT1' HOME SHIFT M SHIFT W SHIFT N"
20 PRINT "SPACE O + SPACE "
30 PRINT" SHIFT N SPACE SHIFT M"
40 FOR L= I TO 100: NEXT L
50 PRINT" HOME SPACE SHIFT W SPACE"
60 PRINT "O T O + C< T"
70 PRINT "SPACE C* G O G"
80 FOR L -1 TO 100: NEXT L
90 GOTO 10
Type RUN and press return
In both examples of animation so far, we ve worked on only one area on
the screen. The next step is to move the animated figure around. The
TAB function helps when you want to move objects from the left edge. —
The following program portrays a snake crawling on the screen.
Remember that SHIFT and the following key are still typed
together.
5 FOR A- 0TO30 ^^^
10 PRINT" SHIFT CLR "
20 PRINT TAB (A) " SHIFT
30 PRINT TAB (A) '' SHIFT
40FORL=1TO 100: NEXT L
50 PRINT" SHIFT CLR "
60 PRINT TAB (A+l) " SHIFT I SHIFT U SHIFT I
SHIFT U"
70PRINTTAB (A-l) " SHIFT J SHIFT K SHIFT J
SHIFT K "
80 FOR L = 1 TO 100: NEXT L
90 NEXT A
Using characters like the ball ( SHIFT Q). you can play video
games on the screen. To move a ball, just erase the ball and replace it
at a new position, as in this program.
u
K
SHIFT
SHIFT
I
J
SHIFT
SHIFT
U
K
SHIFT
SHIFT
1 I
1 J