title: Arduino blinking led issue
body: <p>Ok, so I have started my Project 2 on Arduino Uno. It involves 3 blinking leds. The original idea is that the green led will be lit until a switch is pressed which will make the other two leds blink consecutively. However, I have tried to make the green led keep blinking until I press the switch (instead of it just being lit passively prior to the pressing of the switch). So I made one small adjustment to the if statement, however this didn't work (the led blinked once and then continued being lit).</p>
  
  <pre><code>    int switchState=0;
  
  void setup() {
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(2, INPUT);
  
  // put your setup code here, to run once:
  
  }
  
  void loop() {
  
  switchState= digitalRead(2);
  
  if (switchState==LOW) {
  
  digitalWrite(3, HIGH);
  delay(1000);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  }
  
  else {
  
  digitalWrite(3,LOW);
  digitalWrite(4,LOW);
  digitalWrite(5, HIGH);
  
  delay(250);
  
  digitalWrite(4, HIGH);
  digitalWrite(5, LOW);
  
  delay(250);
  
  }
  
  
  // put your main code here, to run repeatedly:
  
  }
  </code></pre>
  
  <p>The green LED is assigned to pd3 and the two other leds to pd4 and pd5.</p>
  
  <p>So why, upon the verification of the condition, (whether the switch was pressed or not), does the led blink only once- shouldn't it continue blinking? However when I inserted another delay after the 2nd digitalWrite(3, LOW), it worked. Whats the explanation for this? I'm new to this so please make your explanation clear.</p>