Cancel timer on pin state change

hi, first time using arduino uno , i'm making switch 2 inputs. right have 1 second delay before switch gets triggered, make 30 second delay , when pin state changes before time runs out, cancel pin trigger , loop again.
i have searched forum, guess there's information me handle right now.
i appreciate every push in right direction.

my code far

code: [select]

const int powsw = 13; //computer power switch
const int compon = 4; //computer on
const int powon = 7; //power on

void setup() {
  pinmode(powsw, output);
  pinmode(compon, input);
  pinmode(powon, input);
}

void loop() {
  // power off
  if ((digitalread(compon) == high) && (digitalread(powon) == low)) {
    delay(1000);
    triggerpin(powsw);
    }
  // power on 
  if ((digitalread(compon) == low) && (digitalread(powon) == high)) {
    delay(1000);
    triggerpin(powsw); 
    }
}

void triggerpin(int pin) {
  digitalwrite(pin, high);
  delay(100);
  digitalwrite(pin, low);
  delay(100);
}

we use millis() timers things that...

blar blar blink out delay blar blar

heres test code

code: [select]


const int powsw = 13; //computer power switch
const int compon = 4; //computer on
const int powon = 7; //power on
unsigned long previousmillis1 = 0;
unsigned long previousmillis2 = 0;
unsigned long interval1 = 5000;//1000 per second
unsigned long interval2 = 5000;

void setup() {
  pinmode(powsw, output);
  pinmode(compon, input);
  pinmode(powon, input);
}

void loop() {
  unsigned long currentmillis = millis();
  // power off
  if ((digitalread(compon) == high) && (digitalread(powon) == low)) {
    if (currentmillis - previousmillis1 >= interval1) {//wait
      triggerpin(powsw);//after wait this
    }
  } else {
    previousmillis1 = currentmillis;//keep reseting timer when not in use
  }
  // power on
  if ((digitalread(compon) == low) && (digitalread(powon) == high)) {
    if (currentmillis - previousmillis2 >= interval2) {
      triggerpin(powsw);
    }
  } else {
    previousmillis2 = currentmillis;
  }
}

void triggerpin(int pin) {
  digitalwrite(pin, high);
  delay(100);
  digitalwrite(pin, low);
  delay(100);
}

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