#include <REG52.H>

sbit sensor_sa = P0^4;
sbit sensor_sc = P0^5;
sbit sensor_sb = P0^6;
sbit speak = P1^1;

unsigned char time_var;
#define time 0xff

main()
{


	  sensor_sa = 1;
	  sensor_sb = 1;
	  sensor_sc = 1;
	  speak = 1;

     while(1)
	  {
			//speak = 0;
			//sensor_sa = 1; sensor_sb = 0; sensor_sc = 0;
			//time_var = 0x0ff;
			//while(--time_var);

			sensor_sa = 1; sensor_sb = 1; sensor_sc = 0;
			time_var = 0xff;
			while(--time_var);

			sensor_sa = 0; sensor_sb = 1; sensor_sc = 0;
			time_var = 0xef;
			while(--time_var);
			speak = 1;

			sensor_sa = 0; sensor_sb = 1; sensor_sc = 1;
			time_var = 0xdf;
			while(--time_var);

			sensor_sa = 0; sensor_sb = 0; sensor_sc = 1;
			time_var = 0xcf;
			while(--time_var);

			sensor_sa = 1; sensor_sb = 0; sensor_sc = 1;
			time_var = 0xbf;
			while(--time_var);
     }
	   

}