LED Blinking Patterns

Solving Approach

How do you plan to solve it?

Code

/*Paste your code here*/
const int Button = 10;
const int Led1 = 6;
const int Led2 = 5;
const int Led3 = 4;
const int Led4 = 3;

int pattern = 1;             
int lastReading = HIGH;        
int buttonState = HIGH;      
unsigned long lastDebounce = 0;
const unsigned long debounceDelay = 50;

unsigned long lastPatternMillis = 0;
bool phase = true;            
int stepIndex = 0;            

void setup() {
pinMode(Button, INPUT_PULLUP);
pinMode(Led1, OUTPUT);
pinMode(Led2, OUTPUT);
pinMode(Led3, OUTPUT);
pinMode(Led4, OUTPUT);

lastPatternMillis = millis();
applyPatternOutputs();     
}

void loop() {
unsigned long now = millis();

int reading = digitalRead(Button);
if (reading != lastReading) lastDebounce = now;

if (now - lastDebounce > debounceDelay) {
if (reading != buttonState) {
buttonState = reading;
if (buttonState == LOW) {          
pattern++;
if (pattern > 5) pattern = 1;     
phase = true;                    
stepIndex = 0;
lastPatternMillis = now;
applyPatternOutputs();           
}
}
}
lastReading = reading;

unsigned long interval;
if (pattern == 1) {               
interval = (phase ? 1000UL : 500UL);
} else {
interval = 500UL;               
}


if (now - lastPatternMillis >= interval) {
lastPatternMillis = now;

if (pattern == 3) {

stepIndex++;
if (stepIndex > 3) stepIndex = 0;
applyPatternOutputs();
} else {

phase = !phase;
applyPatternOutputs();
}
}
}


void applyPatternOutputs() {
  
digitalWrite(Led1, LOW);
digitalWrite(Led2, LOW);
digitalWrite(Led3, LOW);
digitalWrite(Led4, LOW);

if (pattern == 1) {
if (phase) {
digitalWrite(Led1, HIGH);
digitalWrite(Led2, HIGH);
digitalWrite(Led3, HIGH);
digitalWrite(Led4, HIGH);
} 
}

else if (pattern == 2) {
if (phase) {
digitalWrite(Led1, HIGH);
digitalWrite(Led3, HIGH);
} else {
digitalWrite(Led2, HIGH);
digitalWrite(Led4, HIGH);
}

}
else if (pattern == 3) {
if (stepIndex == 0) digitalWrite(Led1, HIGH);
else if (stepIndex == 1) digitalWrite(Led2, HIGH);
else if (stepIndex == 2) digitalWrite(Led3, HIGH);
else if (stepIndex == 3) digitalWrite(Led4, HIGH);
}

else if (pattern == 4) {
if (phase) {
digitalWrite(Led1, HIGH);
digitalWrite(Led2, HIGH);
} else {
digitalWrite(Led3, HIGH);
digitalWrite(Led4, HIGH);
}
}

else if (pattern == 5) {

if (phase) {
digitalWrite(Led1, HIGH);
digitalWrite(Led4, HIGH);
} else {
digitalWrite(Led2, HIGH);
digitalWrite(Led3, HIGH);
}
}
}

Output

Video

Add a video of the output (know more)