#include "NXCDefs.h"

task main()
{
  SetSensorLight(S4);

  int Light;

  while(true)
  {
    Light =Sensor(S4);
    if(Light<=50)     //빛센서 어두움
    {
        OnFwd(OUT_AC,-50);    //전진
        Wait(10);
    }
    else                         //빛센서 밝음
    {
      OnFwd(OUT_AC,50);          //후진
      Wait(800);
    }
  } //while
 
}