PascalABCNET
uses graphABC;
begin
setpencolor (clRed);
line(20,20,20,200);
line(20,200,80,200);
line(80,200,80,20);
line(80,20,20,20);
setpencolor (clYellow);
line(200,97,200,156);
line(200,156,500,156);
line(500,156,500,97);
line(500,97,200,97);
setpencolor (clGreen);
line(300,120,300,420);
line(300,420,400,420);
line(400,420,400,120);
line(400,120,300,120)
end.