page-1983-101-timex-sinclair-programming-tricks
page-1983-101-timex-sinclair-programming-tricks
page-1983-101-timex-sinclair-programming-tricks
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
There are a number of ways to get the look of motion.Let's send a dot across the screen:Program Listing10 FOR X=jJ TO 6320 PLOT X,20+SIN X30 UNPLOT X-l,20+SIN(X-l)40 NEXT X50 FOR X=62 TO jJ STEP -160 PLOT X,20+SIN X70 UNPLOT X+l,20+SIN(X+l)80 NEXT X90 GOTO 1090 Window TwinklersWell, what would you call them?Program Listing10 CLS20 RAND100 LET X=INT(63*RND)110 LET Y=INT(43*RND)120 PLOT X,Y130 GOTO 10091 Eyeball ScramblerBlink. Blink. Blink. It's enough to make your eyeballshurt!The screen is filled with all the many printablekeyboard characters. Some flash on and off. Some do not.Creates a very lively display!109