programming for obstacle avoider robot

//program to make a smart obstacle avoider robot using a single sensor

//Target board s/n 102011
//Manufacturer Technophilia

#include "reg51.h" // header file for 8051 series of microcontroller
#include "delay.h" //header file for generating time delay
#include "lcd.h" //header file for interfacing 16x2 charactor LCD

void main()
 {
 
  while(1)
   {
  P2=0x50; //by default robot should move forward
if(p10==1) //if sensor is detected
{
 P2=0xA0; //Move backword
 delay(500);
 P2=0x10; //tale a left turn
 delay(400);
}
   }
 }