pop-7 bargraph from analog 1

#include <pop7.h>
int x;
void setup(){
  glcdMode(1);
  setTextSize(3);
}
void loop(){
   x = map(analog(1),0,1023,0,160);
   glcd(1,0,"%d  ",x);
   glcdFillRect(0,80,x,10,GLCD_RED);
   glcdFillRect(x,80,160-x,10,GLCD_BLACK);
}