POP-7 Read ZX-03 R G B Show on GLCD

#include <pop7.h>
unsigned int R=0,G=0,B=0,I=0,a;
void setup() {glcdMode(3); setTextSize(3);}
void loop() {
  I=0;for(a=0;a<40;a++){I=analog(0)+I;}I=I/40;
  R=0;for(a=0;a<40;a++){R=analog(1)+R;}R=R/40;
  G=0;for(a=0;a<40;a++){G=analog(2)+G;}G=G/40;
  B=0;for(a=0;a<40;a++){B=analog(3)+B;}B=B/40;
  glcd(0,0,"I=%d ",I);
  glcd(1,0,"R=%d ",R);
  glcd(2,0,"G=%d ",G);
  glcd(3,0,"B=%d ",B);