Help needed with delay timer in my program

Question

In my program i want to delay the program for a certain time and then carry on. Below is what i have done.
long instant;
for(int i=0;i<length;i++){
instant=testarray;
On();
startTime = System.currentTimeMillis();
do{
endTime = System.currentTimeMillis();               
elapsedtime = endTime - startTime;          
}while(elapsedtime<instant);
Off();
In this program the "testarray" contains "long" numbers which represent the times i want to delay the program at. "length" is the length of the array (which is correct as i have tested it), the "On" and "Off" classes turn certain pins on and off at the parallel port (which work as i have tested it).
My problem is that when i try and run my code above the pin come on once and then stop. It doesnt go on and off like i want it to.
If anyone know how to take times from a array in "long" format, then turn the pin on, delay it for the time in the array, then turn off the port and do all this again as long as there are still times left in the array could you please help me
Thx

Answer 1

in on and off
public void On(){
ParallelPort lpt1 = new ParallelPort(0x378);
int baseAdd=888;
lpt1.writeOneByte(baseAdd,10);
public void Off(){
ParallelPort lpt1 = new ParallelPort(0x378);
int baseAdd=888;
lpt1.writeOneByte(baseAdd,255);
}The problem is that instead of the pins going on and off a lot of times, it goes on once stays on for about 10 seconds and then turns off. Its not blinking on and off like i want it to