'--- Création à partir d'un autre programme et modifier légèrement.---
'---         Pris sur QbasicNews.com mais reste en anglais.        ---
'---     Fonctionne très bien sur QuickBasic 4.5 fr Windows XP.    ---

DIM picture(1000), sprite(1000), spritesh(1000)

SCREEN 13
CIRCLE (10, 10), 10, 4
PAINT (10, 10), 1, 4
CIRCLE (10, 10), 6, 4
PAINT (10, 10), 0, 4
GET (0, 0)-(20, 20), sprite
LINE (0, 0)-(20, 20), 255, BF
CIRCLE (10, 10), 10, 4
PAINT (10, 10), 1, 4
CIRCLE (10, 10), 6, 4
PAINT (10, 10), 255, 4

GET (0, 0)-(20, 20), spritesh
CLS
FOR i = 0 TO 5555 STEP .1
   Cc = 0 + INT(RND * 4)
   IF Cc = 0 THEN Cc = 0
   IF Cc = 1 THEN Cc = 6
   IF Cc = 2 THEN Cc = 8
   IF Cc = 3 THEN Cc = 2
   PSET ((RND * 320), (RND * 200)), Cc
NEXT i

FOR y = 1 TO 200 STEP 16
  FOR x = 1 TO 320 STEP 16
     LINE (x, y)-(320 - x, 200 - y), (RND * 15)
NEXT: NEXT

x = 1: y = 1           'Sprite X and Y coords
xadj = 1: yadj = 1     'Moves the ball
delay = 40000          'Adjust this for speed...

GET (x, y)-(x + 20, y + 20), picture  'Get the background
'---=============================================================---
DO                'Start loop
press$ = INKEY$   'get ready for key presses...

PUT (x, y), spritesh, AND  ' put the sprite down
PUT (x, y), sprite, OR

oldx = x           'Record old position
oldy = y

x = x + xadj      'Move the ball
y = y + yadj

WAIT &H3DA, 8      'This just keeps things clean, don't worry about it...

PUT (oldx, oldy), picture, PSET   'Put the old background down...

GET (x, y)-(x + 20, y + 20), picture   'Get The new background

'PUT (x, y), sprite, PSET        'Finally, put the sprite down...

PUT (x, y), spritesh, AND  ' put the sprite down
PUT (x, y), sprite, OR

IF y > 170 THEN yadj = -1       'This is if it hits the walls...
IF y < 10 THEN yadj = 1
IF x > 290 THEN xadj = -1
IF x < 10 THEN xadj = 1

FOR i = 1 TO delay: NEXT       'This adds a delay, If its to fast or slow...

LOOP UNTIL press$ = CHR$(27)   'Loop until Escape is pressed...