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print "Generate BASIC256 icon - updated for version 1"
fastgraphics
graphsize 512, 512
rem set up initial ball position and speed
r = 20
x = 0 * graphheight / 300
y = 100 * graphheight / 300
yvel = -1.3 * graphheight / 300
xvel = -1.30 * graphwidth / 300
yacc = .015 * graphwidth / 300
dim colors(1)
colors = {red, blue, green, yellow, cyan, orange, grey}
bounce = 0
color black
rect 0,0,graphwidth, graphheight
do
rem change the downward velocity according to the acceleration
yvel = yvel + yacc
rem calculate new position
y = y + yvel
x = x + xvel
rem check for collisions
if y > graphheight - r - 1 then
yvel = -0.9 * yvel
y = graphheight - r - 1
xvel = xvel * 0.9
bounce = bounce + 1
refresh
end if
if x > graphwidth - r - 1 then
xvel = -xvel
x = graphwidth - r - 1
bounce = bounce + 1
refresh
end if
if x < r then
xvel = -xvel
x = r
bounce = bounce + 1
refresh
end if
call drawBall(x,y,r,colors[bounce%colors[?]])
until abs(xvel) < .5
refresh
end
subroutine drawBall(x,y,r,c)
color c
circle x, y, r
end subroutine
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