IPST-SE Simple Line Tracking Demo

#include <ipst.h>
word L,R,speed;
void setup(){
  OK();
  glcdFillScreen(GLCD_SKY);
  setTextSize(3);
  setTextBackgroundColor(GLCD_SKY);
  setTextColor(GLCD_WHITE);
  glcd(0,0,"IPST-SE");
  setTextColor(GLCD_YELLOW);
  glcd(1,0,"MicroBOX");
  setTextSize(2);
  setTextBackgroundColor(GLCD_YELLOW);
  setTextColor(GLCD_BLACK);
  glcd(4,0,"Line Tracing");

}
void loop(){
  L=analog(1);R=analog(2);speed=knob(100);
  if(L>850&&R>850){fd(speed);}
  else if (L<850&&R>850){while(analog(1)<850){sl(speed);}}
  else if (L>850&&R<850){while(analog(2)<850){sr(speed);}}
}