Sleep Mode

Projects Programming
1

Hi All

Need a bit of help getting my UNO to go into sleep mode for the below code

int timeShowRandom = 800;
int timeShowDecision = 1000;
int timeBlink = 20;
int buttonPin = 3;

int buttonPress = false;
int randomNumber;
int previousNo = 0;
int timePassed = 0;

void setup() {
// Set button pin
pinMode(buttonPin, INPUT);
// Set output pins
pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
pinMode(10, OUTPUT);
pinMode(9, OUTPUT);
pinMode(8, OUTPUT);

}

void getRandomNo() {
int rand = random(8,13);
if(rand == previousNo) {
getRandomNo();
} else {
randomNumber = rand;
previousNo = randomNumber;
}
}

void loop() {
// Check if button is pressed
if(digitalRead(buttonPin) == HIGH && buttonPress == false) {
buttonPress = true;
} if(buttonPress == true && timePassed <= timeShowRandom) {
getRandomNo(); // Get random pin number
digitalWrite(randomNumber, HIGH);
delay(timeBlink);
digitalWrite(randomNumber, LOW);
delay(timeBlink);
timePassed = timePassed + (timeBlink * 2);
} else if(buttonPress == true) {
digitalWrite(random(8,13), HIGH); // Set random pin on
delay(timeShowDecision); // For x seconds
buttonPress = false; // Set button to be enabled again
timePassed = 0;
} else {
// Reset all output pins
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
}
}

Thx in advance