51单片机，示波器无反应，求解决

#include<reg51.h>
#define uchar unsigned char

uchar COUNTER;
uchar HIGH=4;
uchar TOTAL=20;

sbit Out = P1^1;

void main( )
{
TMOD = 0x01;
TH0 = 0x3c;
TL0 = 0xb0;
EA = 1;
ET0 = 1;
do{ }while(1);
}

void Time( ) interrupt 1 using 2
{
TH0 = 0x3c;
TL0 = 0xb0;
COUNTER++;
if(COUNTER == HIGH) Out = 0;
else if(COUNTER == TOTAL){
Out = 1;
COUNTER = 0;
}
}

把原来的示波器删除，在换一个