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< OLG Seifhennersdorf < fächerverbindender Unterricht-Pi

var Pie:String;
    key:integer;
    dauer:integer;
    c:Char; k:Char;
    i,posx,z:Integer;

canvas_clear();
Pie :=  '3.141592653589793238462643383279502884197169399375105820974944592307816406286208998' ;

selectSound(19); // 19. MIDI organ
posx:=0;
z:=2*((length(Pie)-2) div 2);
for i := 3 to z+1 do begin
if i mod 2 = 1 then begin
  c := Pie[i];
  k := Pie[i+1];

if c='0' then key:=76;
if c='1' then key:=64;
if c='2' then key:=24;
if c='3' then key:=99;
if c='4' then key:=15;
if c='5' then key:=68;
if c='6' then key:=87;
if c='7' then key:=48; 
if c='8' then key:=39;
if c='9' then key:=19;

if (k='0') or (k='1') or (k='2') then dauer:=100 div  4;
if (k='3') or (k='4') then dauer:=100 div 8;
if (k='5') or (k='6') or (k='7') then dauer:=100 div 8;
if (k='8') or (k='9') then dauer:=100 div 4;

  
  
canvas_fillRect(posx,80-(key-60)*4,dauer,10);           
  posx := posx + dauer+5;
  sound_play(key,dauer*10);
end; 
end;

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