#include <stdio.h>
#include <dos.h>
#include <stdlib.h>

void scriviCar(char col, char car, int pos);
void setvideo();
void interrupt (*oldInt)();
void interrupt miaInt();
int dir, pos, posp, cont;
char col=0x7;
char car=0x2;

int main()
{
	setvideo();
	randomize();
	oldInt=getvect(0x1c);
	setvect(0x1c, miaInt);
	keep(0,(_SS+(_SP/16)-_psp));
	return 0;
}

int trollolol()
{
    dir=random(4);
			switch(dir)
			  {
				case 0:pos-=160;
				       break;
			    case 1:pos-=2;
				       break;
				case 2:pos+=160;
				       break;
	            case 3:pos+=2;
					   break;
			  }
	return pos;

}

void interrupt miaInt()
{
	cont++;
		if(cont==4)
		  {
			int i;
			cont=0;
			pos=trollollol();
			scriviCar(col,' ',posp);
			scriviCar(col,car,pos);
	        posp=pos;
		  }
}