Nested loop timer

[lineb]

So I have to build a program that is timer in the format of h:m:s. It's based off a martian time scale. This is what I have, but the program will do some wierd thing at the beggning where it like shows the minutes, but then loses them and just counts the seconds over and over. Plus i need to put in a reminder at certain times, and thats not showing up.

#include <stdio.h>

#define HOURS 20
#define MINS 12
#define SECS 15

int main() {

int choice=0;
int fchoice;
int hours,mins, secs;
int th, tm, ts;
int done=0;

hours=0;
mins=0;
secs=0;

while (choice != 3) {
//Choice
  printf("Choose one of the following menu options\n");
  printf("1: set time\n");
  printf("2: start timer\n");
  printf("3: quit\n");
  scanf("%d", &choice);
 
//Converstions
 // Execute option 1.
  if (choice == 1) {
		printf("Enter in the time.\n");
		scanf("%d:%d:%d", &hours, &mins, &secs);
  
  	
  }
  // Execute option 2.
  else if (choice == 2) {

  printf("How long would you like me to count?\n");
  scanf("%d:%d:%d", &th, &tm, &ts);
  
  hours+=HOURS;
  mins+=MINS;
  secs+=SECS;
  
  while (done!=1){
  for (hours=hours-HOURS;((hours<HOURS)&&(done!=1));hours++)
  	for (mins=mins-MINS;((mins<MINS)&&(done!=1)); mins++)
		for (secs=secs-SECS;((secs<SECS)&&(done!=1)); secs++)
		{
			printf("current time  >  %d:%d:%d\n", hours,mins,secs);
				printf("current timer  >  %d:%d:%d\n", th,tm,ts);
			
			if ((hours=4)&&(mins=0)&&(secs=0)){
				printf("Have you had your breakfast?\n");
				printf("1: Yes\n");
				printf("0: No\n");
				scanf("%d", &fchoice);
				}
				
				if ((th==0)&&(tm==0)&&(ts==0)){
				done=1;
				}
				ts--;
					if (ts==-1){
						ts=SECS-1;
				
						if(tm==-1){
							tm=MINS-1;
								if(th==-1){
									th=HOURS-1;}
								else 
									th--;
								}
						else
							tm--;
						 }
				 }
		 }
		
			hours=0;
			mins=0;
			secs=0;
  }
  
  else if (choice == 3) {
  
  printf("Thankyou.\n");
  break;
  }
  
  else
  		printf("invalid answer, try again.\n");
}
  return 0;
}

[lineb]

Saw Cgurl has the same problem, so looking at that to see if i see anything