Programa en lenguaje C entre paréntesis
#Contiene "graphics.h"
main()
{int driver, mode, I;
float j=1, k = 1; p>
p>
driver = VGAmode = VGAHI
init graph( amp; driver amp mode, "";
setbkcolor(amarillo);
for( I = 0; i lt=25; i )
{
establecer color(8);
circulo(310,250,k) ;
p>k = k j
j = j 0.3
}
getch(); p>}