``````{
movement mimics dancing rain? [closest analogy I can think of]
}
uses crt;
const Balls = 1900;  {increment if too fast: decrement if too slow}
type movement= record
x,   y : integer;  { position }
dx,  dy : integer;  { velocity }
ddx, ddy : integer;  { acceleration }
color    : integer;
MaxYValue: integer;
END;
VAR ch : char;
I  : integer;
Ball: array[1..BAlls] of movement;
Procedure VideoMode ( Mode : Byte );
Begin { VideoMode }
Asm
Mov  AH,00
Mov  AL,Mode
Int  10h
End;
End;  { VideoMode }
procedure PutDot(x,y,color:integer);
begin
Mem[\$A000{VGA_Segment}:(y*320)+x] := color;
end;

BEGIN
videoMODE(\$13);
randomize;
{init all balls}
for i:=1 to BAlls do BEGIN
With ball[i] do BEGIN
ddx := 0;             { no horizontal acceleration }
ddy := 1;             { constant vertical acceleration }
dx := Random(2)-1;   { push it left of right to start}
if dx=0 then dx:=1;  { all balls will have a horizontal movement}
dy:=0;               { the object is initially at rest }
x := I div ((i div 320)+1); { initial coordinates, as }
y := i mod 130+random(3); {   you specified }
color:=random(I mod 255);  {Each Balls color}
MaxYValue:=Y+1;
END; {with}
END; {for do loop}
WHILE not(keypressed) do begin
FOR i:=1 to Balls do BEGIN
With ball[i] do BEGIN
putdot(x, y, 0);    { blank out the pixel drawn on the last iteration }
dx := dx + ddx;     { updating velocity }
dy := dy + ddy;
x  :=  x +  dx;     { updating position }
y  :=  y +  dy;
IF x< 1 then begin      {hits left of screen}
X:=1;
dx:=dx*-1;
End;
IF x > 319 then begin   {hits right of screen}
x :=319;
dx:=-dx;
END;
IF y > 190 then begin   { BOUNCE! }
y := 190;
dy := -dy;
End;
putdot(x, y, color);  { draw the pixel at the new position }
END; {WITH}
END; {for do loop}
End; {KEYPRESS}
videoMODe(\$3);
end. {PROGRAM}

``````