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print "Bouncing Ball Animation"
rem set up initial position for ball, and its speed
x = 10
y = 10
r = 10
xinc = 5
yinc = 4
moveBall:
x = x + xinc
y = y + yinc
rem This is where we check for collisions with the wall
if y > 280 then yinc = -yinc : sound(440, 50)
if x > 280 then xinc = -xinc : sound(440, 50)
if x < 14 then xinc = -xinc : sound(440, 50)
if y < 14 then yinc = -yinc : sound(440, 50)
rem clear the screen, then draw the ball
clg
gosub drawBall
goto moveBall
drawBall:
color black
circle x, y, r
return
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