/****  Note that svgalib mut be installed & the program compiled with -lvga option   ****/

#include < stdio.h>
#include < stdlib.h>
#include < vga.h>  


int main ()
{

int i, j, k;
char alph ;

vga_setmode(24) ;

vga_setrgbcolor( 255, 255, 255)  ;

do
{

alph = vga_getkey() ;

if ( alph == 'r' )
vga_setrgbcolor( 255, 0 ,0 ) ;

if ( alph == 'g' )
vga_setrgbcolor( 0, 255, 0 ) ;

    for( j= 0;  j < 20 ; j++)
    {
        for k =0 ; k < 100; k++ )
        vga_drawpixel ( k, j ) ;
    }

}
while ( alph != 'Q' ) ;

vga_ setmode (TEXT) ;

return 0 ;

}
/************************/

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