How do i set up a counter to read sleep time?

i have this homework assignment where i have to input a text file into my java program. the file is a "bed sensor", and tells you if the person is in a deep sleep, a restless sleep, or interrupted sleep(awake), with 0s, 1s, and 2s respectively. each line has a 0, 1, or 2 and there are 86,400 lines (one line for each second of the day).

I have figured out most of the assignment but one part i cannot figure out how to code.

My problem is i have to figure out when the person falls asleep and then output "Sleep time: (answer) hours after midnight".

i've been using counters and if statements and i would like to continue along this path if possible. i've attached my code.. and i feel like this should be pretty simple to figure out based on what i've already done... i just cannot wrap my head around it. i would appreciate any help or advice. thanks

public static void main(String[] args) 
{
    try 
    {
        File sleepDataFile = new File("/Users/homeWork3/sleep_data.csv"); 
        Scanner sleepData = new Scanner(sleepDataFile); // scans the data from the file into this java program
        double totalSecondsCounter = 0, wakeCounter = 0, timeAwakeCounter = 0, timeAsleepCounter = 0, deepSleepCounter = 0, restlessSleepCounter = 0, interruptedSleepCounter = 0;
        double wakeUpTime = 0, sleepTime = 0; 
        double sleepQuality = 0;

        boolean inSleep = false;

        while (sleepData.hasNextLine()) // this loop writes data to java as long as there is a next line
        {   
            String data = sleepData.nextLine(); //  converts the file data to strings
            double val = Double.parseDouble(data);  //  changes string type to double type
            totalSecondsCounter++;

            if (inSleep == true)
            {
                timeAsleepCounter++;
            }
            if (inSleep == false)
            {
                timeAwakeCounter++;
            }
            if (val == 0) //deep sleep
            {
                deepSleepCounter++;
                inSleep = true;
                wakeCounter = 0;

            }
            if (val == 1) //restless sleep
            {
                restlessSleepCounter++;
                inSleep = true;
                wakeCounter = 0;
            }
            if (val == 2) // interrupted sleep / awake
            {
                wakeCounter++;
                inSleep = false;
            }
            if (val == 2 && wakeCounter < 1800)
            {
                interruptedSleepCounter++;
                inSleep = true;
            }
            if (val == 2 && wakeCounter > 1800)
            {
                inSleep = false;
            }
            if (wakeCounter == 1800) // 1800 seconds = 30 minutes. counter is set for 30 min of interrupted sleep.
            {
                wakeUpTime = totalSecondsCounter;
            }   
            if (val != 2 )
            {

            }

        }
        sleepData.close();


        System.out.println("Sleep Report for 24 hour period.");
        System.out.println("----------------------------------------------------------");
        System.out.println("Wake Time: \t\t\t\t" + wakeUpTime / 60 / 60 + "\t hours after midnight"); 
        System.out.println("Sleep Time: \t\t\t\t" + sleepTime / 60 /60 + "\t\t\t hours after midnight");
        System.out.println("Duration of Deep Sleep: \t\t" + deepSleepCounter / 60 / 60 + "\t hours"); 
        System.out.println("Duration of Restless Sleep: \t\t" + restlessSleepCounter / 60 / 60 + "\t hours" );
        System.out.println("Duration of Interrupted Sleep: \t\t" + interruptedSleepCounter / 60 / 60 + "\t hours");

    } 
    catch (FileNotFoundException e) 
    {
        System.out.println("An error occurred.");
        e.printStackTrace(); 
    }
}

}